CN114436612A - Gypsum-based self-leveling mortar composition - Google Patents
Gypsum-based self-leveling mortar composition Download PDFInfo
- Publication number
- CN114436612A CN114436612A CN202210096446.3A CN202210096446A CN114436612A CN 114436612 A CN114436612 A CN 114436612A CN 202210096446 A CN202210096446 A CN 202210096446A CN 114436612 A CN114436612 A CN 114436612A
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- Prior art keywords
- parts
- gypsum
- agent
- mortar composition
- based self
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000010440 gypsum Substances 0.000 title claims abstract description 61
- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 61
- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 44
- 239000000203 mixture Substances 0.000 title claims abstract description 41
- 239000000463 material Substances 0.000 claims abstract description 63
- 239000000919 ceramic Substances 0.000 claims abstract description 33
- 239000004568 cement Substances 0.000 claims abstract description 26
- 239000011162 core material Substances 0.000 claims abstract description 26
- 239000000843 powder Substances 0.000 claims abstract description 15
- 239000004576 sand Substances 0.000 claims abstract description 15
- 239000003795 chemical substances by application Substances 0.000 claims description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 33
- 235000012245 magnesium oxide Nutrition 0.000 claims description 22
- 239000002245 particle Substances 0.000 claims description 22
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 21
- 239000007787 solid Substances 0.000 claims description 21
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 20
- 229910021538 borax Inorganic materials 0.000 claims description 17
- 239000004328 sodium tetraborate Substances 0.000 claims description 17
- 235000010339 sodium tetraborate Nutrition 0.000 claims description 17
- 239000002270 dispersing agent Substances 0.000 claims description 16
- 239000000230 xanthan gum Substances 0.000 claims description 16
- 229920001285 xanthan gum Polymers 0.000 claims description 16
- 229940082509 xanthan gum Drugs 0.000 claims description 16
- 235000010493 xanthan gum Nutrition 0.000 claims description 16
- 229910019142 PO4 Inorganic materials 0.000 claims description 13
- 238000001035 drying Methods 0.000 claims description 12
- 238000005469 granulation Methods 0.000 claims description 12
- 230000003179 granulation Effects 0.000 claims description 12
- 239000000839 emulsion Substances 0.000 claims description 11
- 229910000402 monopotassium phosphate Inorganic materials 0.000 claims description 11
- 239000010452 phosphate Substances 0.000 claims description 11
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 11
- 235000009496 Juglans regia Nutrition 0.000 claims description 10
- NBIIXXVUZAFLBC-UHFFFAOYSA-L Phosphate ion(2-) Chemical compound OP([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-L 0.000 claims description 10
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 10
- 240000008042 Zea mays Species 0.000 claims description 10
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 claims description 10
- 235000002017 Zea mays subsp mays Nutrition 0.000 claims description 10
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 claims description 10
- 229910000387 ammonium dihydrogen phosphate Inorganic materials 0.000 claims description 10
- 239000000292 calcium oxide Substances 0.000 claims description 10
- 235000012255 calcium oxide Nutrition 0.000 claims description 10
- 235000005822 corn Nutrition 0.000 claims description 10
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 claims description 10
- 229910000388 diammonium phosphate Inorganic materials 0.000 claims description 10
- 235000019838 diammonium phosphate Nutrition 0.000 claims description 10
- ZPWVASYFFYYZEW-UHFFFAOYSA-L dipotassium hydrogen phosphate Chemical group [K+].[K+].OP([O-])([O-])=O ZPWVASYFFYYZEW-UHFFFAOYSA-L 0.000 claims description 10
- 238000013508 migration Methods 0.000 claims description 10
- 230000005012 migration Effects 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 10
- 235000019837 monoammonium phosphate Nutrition 0.000 claims description 10
- 235000019796 monopotassium phosphate Nutrition 0.000 claims description 10
- PJNZPQUBCPKICU-UHFFFAOYSA-N phosphoric acid;potassium Chemical group [K].OP(O)(O)=O PJNZPQUBCPKICU-UHFFFAOYSA-N 0.000 claims description 10
- 235000020234 walnut Nutrition 0.000 claims description 10
- 239000002893 slag Substances 0.000 claims description 9
- 239000007921 spray Substances 0.000 claims description 9
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 8
- 235000013312 flour Nutrition 0.000 claims description 8
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- 239000005995 Aluminium silicate Substances 0.000 claims description 7
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 7
- 235000012211 aluminium silicate Nutrition 0.000 claims description 7
- 239000000440 bentonite Substances 0.000 claims description 7
- 229910000278 bentonite Inorganic materials 0.000 claims description 7
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 7
- 239000003638 chemical reducing agent Substances 0.000 claims description 7
- 239000010881 fly ash Substances 0.000 claims description 7
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 229910021487 silica fume Inorganic materials 0.000 claims description 7
- 235000019832 sodium triphosphate Nutrition 0.000 claims description 7
- 239000000375 suspending agent Substances 0.000 claims description 7
- 238000011282 treatment Methods 0.000 claims description 7
- 239000002518 antifoaming agent Substances 0.000 claims description 6
- 229920005646 polycarboxylate Polymers 0.000 claims description 6
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 6
- 239000002202 Polyethylene glycol Substances 0.000 claims description 5
- 229920002472 Starch Polymers 0.000 claims description 5
- 239000012190 activator Substances 0.000 claims description 5
- 239000007864 aqueous solution Substances 0.000 claims description 5
- 239000012752 auxiliary agent Substances 0.000 claims description 5
- 229920001223 polyethylene glycol Polymers 0.000 claims description 5
- 239000008107 starch Substances 0.000 claims description 5
- 235000019698 starch Nutrition 0.000 claims description 5
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 4
- 238000011418 maintenance treatment Methods 0.000 claims description 4
- 238000012216 screening Methods 0.000 claims description 4
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 4
- 235000011152 sodium sulphate Nutrition 0.000 claims description 4
- 239000004575 stone Substances 0.000 claims description 4
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims description 3
- 239000004115 Sodium Silicate Substances 0.000 claims description 3
- 239000004480 active ingredient Substances 0.000 claims description 3
- 239000000920 calcium hydroxide Substances 0.000 claims description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 3
- 239000008187 granular material Substances 0.000 claims description 3
- 239000011259 mixed solution Substances 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- FQENQNTWSFEDLI-UHFFFAOYSA-J sodium diphosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O FQENQNTWSFEDLI-UHFFFAOYSA-J 0.000 claims description 3
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims description 3
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 3
- 229940048086 sodium pyrophosphate Drugs 0.000 claims description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 235000019818 tetrasodium diphosphate Nutrition 0.000 claims description 3
- 239000004593 Epoxy Substances 0.000 claims description 2
- 230000004931 aggregating effect Effects 0.000 claims description 2
- 229910000272 alkali metal oxide Inorganic materials 0.000 claims description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 2
- 235000013339 cereals Nutrition 0.000 claims description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-M dihydrogenphosphate Chemical compound OP(O)([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-M 0.000 claims description 2
- 240000007049 Juglans regia Species 0.000 claims 1
- 238000002360 preparation method Methods 0.000 abstract description 9
- 238000010276 construction Methods 0.000 abstract description 3
- 239000000126 substance Substances 0.000 description 11
- 241000758789 Juglans Species 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 9
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 7
- 238000012360 testing method Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 238000001354 calcination Methods 0.000 description 4
- 229910052681 coesite Inorganic materials 0.000 description 4
- 229910052593 corundum Inorganic materials 0.000 description 4
- 229910052906 cristobalite Inorganic materials 0.000 description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- 229910052682 stishovite Inorganic materials 0.000 description 4
- 229910052905 tridymite Inorganic materials 0.000 description 4
- 229910001845 yogo sapphire Inorganic materials 0.000 description 4
- 230000002209 hydrophobic effect Effects 0.000 description 3
- 239000002440 industrial waste Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000003837 high-temperature calcination Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- GVALZJMUIHGIMD-UHFFFAOYSA-H magnesium phosphate Chemical compound [Mg+2].[Mg+2].[Mg+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O GVALZJMUIHGIMD-UHFFFAOYSA-H 0.000 description 2
- 239000004137 magnesium phosphate Substances 0.000 description 2
- 229960002261 magnesium phosphate Drugs 0.000 description 2
- 229910000157 magnesium phosphate Inorganic materials 0.000 description 2
- 235000010994 magnesium phosphates Nutrition 0.000 description 2
- 235000012054 meals Nutrition 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 239000007836 KH2PO4 Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical class OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 1
- 241000876852 Scorias Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- CKMXBZGNNVIXHC-UHFFFAOYSA-L ammonium magnesium phosphate hexahydrate Chemical compound [NH4+].O.O.O.O.O.O.[Mg+2].[O-]P([O-])([O-])=O CKMXBZGNNVIXHC-UHFFFAOYSA-L 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002056 binary alloy Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 239000011258 core-shell material Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000013530 defoamer Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- GNSKLFRGEWLPPA-UHFFFAOYSA-M potassium dihydrogen phosphate Chemical compound [K+].OP(O)([O-])=O GNSKLFRGEWLPPA-UHFFFAOYSA-M 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 239000008262 pumice Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052567 struvite Inorganic materials 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
- C04B28/142—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing synthetic or waste calcium sulfate cements
- C04B28/144—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being a flue gas desulfurization product
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/02—Agglomerated materials, e.g. artificial aggregates
- C04B18/027—Lightweight materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1055—Coating or impregnating with inorganic materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5025—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with ceramic materials
- C04B41/5029—Magnesia
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
- C04B41/61—Coating or impregnation
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/60—Flooring materials
- C04B2111/62—Self-levelling compositions
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Civil Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention belongs to the field of material preparation, and discloses a gypsum-based self-leveling mortar composition. The mortar composition comprises: aggregate, sand, desulfurized gypsum powder, cement and auxiliaries, wherein the aggregate comprises a core material, a porous layer material and a ceramic layer structure material. The aggregate used by the gypsum-based self-leveling mortar composition is of a core-porous layer-ceramic layer structure, and the performance of the product is stable, so that the mortar composition has good construction performance.
Description
Technical Field
The invention belongs to the field of material preparation, and particularly relates to a gypsum-based self-leveling mortar composition.
Background
The aggregate is the bulk density of 900-1500Kg/m3The main categories of the coarse and fine aggregates include artificial aggregates (such as ceramsite, ceramic sand and the like), natural aggregates (such as pumice, scoria and the like) and industrial waste residues aggregates (such as natural coal gangue, coal slag and the like).
The preparation method of the aggregate is that the industrial waste residue, the cement, the alkaline substance and other materials are physically mixed, then are granulated by a disc granulator, and then are calcined at a high temperature of more than 1000 ℃ to form the aggregate. At present, the aggregate is mainly sintered ceramsite, carbonized steel slag lightweight aggregate and massive aggregate, and the basic production and manufacturing process is mature. Currently known aggregates include:
the ceramic waste material recorded in CN 110950558A is used for preparing high-strength aggregates and the high-strength aggregates prepared by the same, the high-strength aggregates are light in weight, high in strength, low in heat conduction coefficient, high in refractoriness, good in chemical stability, good in durability, good in heat preservation and heat insulation, high in industrial solid waste utilization rate, high in cylinder pressure strength and high in cylinder pressure strength, the strength of the high-strength aggregates can reach 11.8MPa, the high-strength aggregates are rare, the preparation process of the high-strength aggregates comprises a calcination procedure, the energy consumption and the cost are invisibly increased in the stage, and the high-strength aggregates cannot be popularized for a long time under the current large environment advocating high environmental protection and low energy consumption.
The preparation method of the hydrophobic ceramsite aggregate is also provided by the national institute of building materials science, institute of research, limited company, China, and the prepared aggregate has the advantages of high solid waste utilization rate, high strength, good hydrophobicity and sound insulation, and the like, but the production process is complex, the aggregate needs to be subjected to mixing granulation, calcining granulation and surface coating of the hydrophobic material for three times of granulation, and the ceramsite needs to be additionally coated with the hydrophobic material besides the calcining, so that the production cost is greatly increased, and the mass production is not facilitated.
Therefore, aiming at the problems that the production and manufacturing cost of the existing aggregate is high, and the prepared aggregate needs high-temperature calcination and more polymer additives, redesigning the formula of the aggregate is urgently needed, so that the aggregate which has strong applicability and high strength and can replace building sand is prepared.
In addition, as the living standard of people is improved, the requirements for the building mortar are also continuously improved, so that a new mortar composition is urgently needed to be proposed.
Disclosure of Invention
The invention aims to provide a gypsum-based self-leveling mortar composition aiming at the defects of the prior art. The aggregate used by the gypsum-based self-leveling mortar composition is of a core-porous layer-ceramic layer structure, and the performance of the product is stable, so that the mortar composition has good construction performance.
In order to achieve the above objects, the present invention provides, in one aspect, a gypsum-based self-leveling mortar composition comprising:
aggregating;
sand;
desulfurized gypsum powder;
cement;
an auxiliary agent;
the aggregate includes a core material, a porous layer material, and a ceramic layer structure material.
According to the invention, preferably, the mortar composition comprises the following components in parts by weight: 10-30 parts of aggregate, 20-30 parts of sand, 50-60 parts of desulfurized gypsum powder, 1-5 parts of cement and 0.1-0.5 part of auxiliary agent.
According to the present invention, preferably, the auxiliary comprises the following components in parts by weight: 0.05-0.15 part of defoaming agent, 0.1-0.25 part of water reducing agent, 0.001-0.05 part of suspending agent and 0.01-0.05 part of gypsum retarder.
In the invention, the gypsum retarder adopts a protein retarder.
In the invention, as a preferable scheme, the fineness of the desulfurized gypsum powder is less than or equal to 0.5 percent through a sieve with the fineness of 0.2mm, the fineness of the semi-hydrated gypsum phase is more than or equal to 80 percent, the anhydrous gypsum phase is less than or equal to 5 percent, the semi-hydrated gypsum phase is less than or equal to 4 percent, the water-soluble chloride ion is less than or equal to 400mg/kg, the breaking strength is more than or equal to 3MPa, and the compressive strength is more than or equal to 6.0 MPa.
According to the invention, the sand preferably has a bulk density of 900-3The main component is SiO2。
In the invention, the cement in the gypsum-based self-leveling mortar composition is ordinary 425 cement, and the chemical components comprise 60-65% of CaO and SiO2 18％-19％，Al2O34％-5％，Fe2O32％-3％，MgO2％-3％，SO33-4%, the burning vector is less than or equal to 3%, and the NaOequi is less than or equal to 1%.
In the present invention, as a preferable scheme, the preparation method of the gypsum-based self-leveling mortar composition comprises the following steps: and uniformly stirring the aggregate, the sand, the desulfurized gypsum powder, the cement and the auxiliary agent in a dry mixer, and then stirring with a proper amount of water to obtain the gypsum-based self-leveling mortar composition.
According to the present invention, preferably, the core material is walnut shell solid particles and/or corn meal solid particles;
the porous layer material comprises: cement, active ingredients, an activator, a balling agent, a dispersant, a migration agent and xanthan gum;
the ceramic layer structure material comprises: dead burned MgO, soluble dihydric phosphate, borax, soluble hydrogen phosphate and a curing agent.
According to the present invention, preferably, the core material, the porous layer material and the ceramic layer structure material are used in a ratio of (0.1-1.2): 1: (2-3).
According to the present invention, preferably, the porous layer material comprises the following components in parts by weight: 1-10 parts of cement, 50-120 parts of active component, 1-10 parts of excitant, 1-10 parts of balling agent, 1-10 parts of dispersant, 0-3 parts of migration agent and 1-10 parts of xanthan gum;
the ceramic layer structure material comprises the following components in parts by weight: 20-80 parts of dead burned MgO, 10-60 parts of soluble dihydric phosphate, 0.5-4 parts of borax, 1-10 parts of soluble hydrogen phosphate and 5-10 parts of curing agent.
According to the present invention, preferably, the porous layer material comprises the following components in parts by weight: 5-10 parts of cement, 50-110 parts of active component, 1-10 parts of activator, 3-10 parts of balling agent, 2-10 parts of dispersant, 0.1-2.5 parts of migration agent and 1-5 parts of xanthan gum.
According to the present invention, preferably, the ceramic layer structure material comprises the following components in parts by weight: 20-60 parts of dead burned MgO, 10-40 parts of soluble dihydric phosphate, 0.5-3 parts of borax, 1-5 parts of soluble hydrogen phosphate and 5-10 parts of curing agent.
According to the present invention, preferably, the active component comprises the following components in parts by weight: 30-50 parts of fly ash, 10-30 parts of active blast furnace slag, 10-20 parts of silica fume, 1-10 parts of kaolin and 0-1 part of stone powder.
In the present invention, in the active ingredient:
the chemical components of the fly ash are as follows: SiO 22 18％-20％，CaO 50％-60％，Al2O3 3％-5％，Fe2O32％-3％，MgO 1.5％-2.5％，SO32-3 percent of the total weight of the alloy, and the ignition loss is less than or equal to 2 percent.
The chemical components of the active blast furnace slag are as follows: CaO 30-40%, SiO220％-30％，Al2O3 10％-15％，Fe2O3＜0.5％，MgO 6％-7％，SO3 2％-3％，NaOequi≤1％。
The chemical components of the silica fume are as follows: SiO 22≥90％，H21 to 1.5 percent of O, 2 to 3 percent of loss on ignition, less than or equal to 1 percent of other substances and 200kg/m of density3Left and right.
The chemical components of the cement are as follows: CaO 60-65%, SiO2 18％-19％，Al2O34％-5％，Fe2O32％-3％，MgO2％-3％，SO33-4%, the burning vector is less than or equal to 3%, and the NaOequi is less than or equal to 1%.
According to the present invention, preferably, the activator is at least one of quicklime, gypsum, calcium hydroxide, sodium silicate, sodium sulfate and triethanolamine.
According to the present invention, preferably, the balling agent is at least one of polyvinyl alcohol, polyethylene glycol, starch and bentonite.
According to the present invention, preferably, the dispersant is at least one of sodium pyrophosphate, sodium tripolyphosphate, sodium hexametaphosphate, and polycarboxylate.
According to the invention, preferably, the migrating agent is an alkali metal oxide, preferably K2O and/or Na2O。
According to the present invention, preferably, the curing agent is at least one of an acrylic emulsion, an epoxy emulsion, and a VAE emulsion.
According to the present invention, preferably, the soluble dihydrogen phosphate is potassium dihydrogen phosphate and/or ammonium dihydrogen phosphate.
According to the invention, preferably the soluble hydrogen phosphate salt is dipotassium hydrogen phosphate and/or diammonium hydrogen phosphate.
According to the present invention, preferably, the method for preparing the aggregate comprises the steps of:
s1: uniformly stirring and mixing the cement, the active component, the exciting agent, the balling agent, the dispersing agent, the xanthan gum and the optional migration agent, and drying and screening to obtain the porous layer material; mixing the porous layer material with the core material for spray granulation to obtain porous layer granules with the surface not completely dried;
s2: stirring and mixing the dead burned MgO, the soluble dihydric phosphate, the borax, the soluble hydrogen phosphate and the water uniformly to obtain an aqueous solution; and spraying the aqueous solution and the curing agent on the surface of the porous layer granulation surface which is not completely dried in sequence, and curing and drying to obtain the aggregate.
In the present invention, the porous layer having not all of its surface dried is granulated into a porous layer having a slight strength and having not all of its surface dried.
According to the present invention, it is preferable that, in step S1,
the temperature of the drying treatment is 100-200 ℃;
the spray used for the spray granulation is water or a mixed solution of water and triethanolamine.
According to the present invention, preferably, the weight ratio of the triethanolamine to the water is 1: (0.15-0.3).
According to the present invention, it is preferable that, in step S2,
the ratio of the mass of the water to the sum of the mass of the dead burned MgO, the soluble dihydric phosphate, the borax and the soluble hydrogen phosphate is (0.1-0.3): 1;
the curing treatment is carried out in a high-temperature high-humidity oxidation kiln or a standard curing chamber; the time of the maintenance treatment is 22-26 h;
the temperature of the drying treatment is 100-200 ℃.
The grain size of the aggregate is 40-140 meshes.
The aggregate of the invention is in a core-porous layer-ceramic layer structure, wherein the formation of the core mainly utilizes the physical adhesion effect, the walnut shell solid particles or the corn flour solid particles and the porous layer material are sprayed and slowly roll in a granulator, and the walnut shell solid particles or the corn flour solid particles form the core part.
The reaction mechanism of the formation of the porous layer is as follows:
the cement in the porous layer material reacts with water to form Ca (OH)2，Ca(OH)2With SiO in the active component2Reacts with water in the system to generate C-S-H gel, and in the process, the excitant plays a role in promoting the process and improving the early strength of the cement-mineral admixture binary system.
The reaction mechanism for the formation of the ceramic layer is as follows:
firstly:
MgO+NH4HPO4+5H2O＝MgNH4PO4.6H2o (struvite) (reaction 1)
MgO+KH2PO4+5H2O＝MgKPO4.6H2O (reaction 2)
Then:
the formed magnesium phosphate cement enters a hydration stage and mainly comprises the following components: dissolution of phosphate, dissolution of MgO in acidic phosphate solution to release Mg2+；Mg2+With water molecules and H+Complexing to form Mg (H) with positive charge2O)6 2+"hydrated sol"; "hydrated Sol" with PO4 3-The formation of hydrated products, with the release of heat, the "hydrated sol" gradually decreases as the reaction proceeds; with "hydrated sol" with PO4 3-The polymerization reaction with PO is continuously carried out4 3-The polymerized sol is mutually bonded to form gel, and a network structure begins to form along with the formation of a large amount of gel; the gel is saturated and crystallized to form crystals of magnesium phosphate cement.
The technical scheme of the invention has the following beneficial effects:
(1) the aggregate used by the gypsum-based self-leveling mortar composition is of a core-porous layer-ceramic layer structure, and the performance of the product is stable, so that the mortar composition has good construction performance.
(2) The aggregates of the invention are prepared without the need for high temperature calcination. The aggregate of the invention takes walnut shell solid particles or corn flour solid particles as a core, cement, active components, an exciting agent, a balling agent, a dispersing agent, a migration agent and xanthan gum are made into a porous layer, dead burned MgO, ammonium dihydrogen phosphate, potassium dihydrogen phosphate, borax, diammonium hydrogen phosphate and dipotassium hydrogen phosphate are made into a ceramic layer core shell to form a core-porous layer-ceramic layer structure, the performance stability of the prepared product is ensured, the particle size screening can be directionally carried out according to the application (light weight, heavy weight, coarse and fine of the aggregate), and the production and manufacturing cost of the aggregate is greatly reduced.
(3) The core (walnut shell solid particles or corn meal solid particles) of the present invention can age on itself to form a hollow structure, resulting in a lower density aggregate.
(4) The aggregate of the invention mainly utilizes industrial waste, and is an environment-friendly product; the aggregate of the invention is prepared without calcination, and is cured in a high-temperature high-humidity oxidation kiln or a standard curing chamber and dried at the temperature of 100 ℃ and 200 ℃.The xanthan gum used in the invention has suspension performance, and can ensure that other materials are uniformly distributed around the xanthan gum, promote the full contact among other materials and increase the reaction among other materials. Preferred for use in the invention is K2O and/or Na2O as a migrating agent, K in a migrating agent+Or Na+The ceramic layer structure formed by the reaction of the ceramic layer structure material is promoted as a migration agent.
(5) The aggregate bulk density of the invention is 400-1000Kg/m3The cylinder pressure strength is 2MPa-6.5MPa, the 28MPa breaking rate is less than or equal to 5 percent, the water absorption rate is less than or equal to 8 percent, the gradation is 40 meshes-200 meshes, and the sphericity is more than or equal to 90 percent.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings.
Fig. 1 shows a process flow diagram of a method for preparing an aggregate for use in a gypsum-based self-leveling mortar composition according to the invention.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
In each of the following embodiments, the following examples,
in the gypsum-based self-leveling mortar composition:
the defoaming agent is selected from Defeng defoaming agent Co., Ltd, Dongguan city;
the water reducing agent is selected from Vivian scientific and technological additives, Inc.;
the suspending agent is selected from Liaoning Qingmai industry Co., Ltd;
the gypsum retarder is selected from Shanghai minister and initiator chemical company;
in the aggregate:
the balling agent comprises: polyvinyl alcohol and polyethylene glycol were purchased from Heqiansheng Biotechnology Ltd. The purchased polyvinyl alcohol and polyethylene glycol are AR analysis pure chemicals, and the purity is more than or equal to 90 percent; the starch is purchased from Shanghai national medicine reagent company Limited, is soluble in water, has a pH value of between 6.0 and 7.5, an ignition residue (calculated by sulfate) is less than or equal to 0.5 percent, and a drying weight loss rate is less than or equal to 13 percent; the bentonite is purchased from great industry and trade companies of Renshouxing, Sichuan province, and the specification is 400 meshes;
among the dispersants: sodium pyrophosphate, sodium tripolyphosphate, sodium hexametaphosphate and polycarboxylate are all purchased from chemical reagent experiment consumables GmbH, and the purchased medicines are all industrial grade;
the kaolin is selected from new constant-source materials, Inc.;
the xanthan gum is selected from Hongshan Yuan Biotechnology Co., Ltd, food grade;
the curing agent acrylic emulsion is selected from green-source chemical limited company, has the solid content of 40-50 percent, the viscosity of 80-200mPa.s, the monomer residual quantity of less than or equal to 0.5 percent and the pH value range of 8-9.
Example 1
The present embodiment provides an aggregate comprising a core material, a porous layer material, and a ceramic layer structure material;
the core material is walnut shell solid particles and/or corn flour solid particles;
the porous layer material comprises the following components in parts by weight: 5 parts of cement, active components (30 parts of fly ash, 30 parts of active blast furnace slag, 10 parts of silica fume, 3 parts of kaolin), an excitant (3 parts of quicklime and 1 part of gypsum), a balling agent (5 parts of polyvinyl alcohol and 2 parts of bentonite), a dispersing agent (5 parts of sodium tripolyphosphate and 3 parts of polycarboxylate), 3 parts of xanthan gum and K20.25 part of O;
the ceramic layer structure material comprises the following components in parts by weight: 55 parts of dead burned MgO, 18 parts of ammonium dihydrogen phosphate, 20 parts of potassium dihydrogen phosphate, 1 part of borax, 5 parts of diammonium hydrogen phosphate, 1 part of dipotassium hydrogen phosphate and 5 parts of acrylic emulsion.
The mass ratio of the core material to the porous layer material to the ceramic layer structure material is 0.3: 1: 1;
the preparation method of the aggregate comprises the following steps:
s1: uniformly stirring and mixing the cement, the active component, the exciting agent, the balling agent, the dispersing agent and the xanthan gum, and drying (100-200 ℃) and screening to obtain the porous layer material (the particle size of the porous layer material is 40-140 meshes); mixing the porous layer material with the core material for spray granulation to obtain porous layer granules with incompletely dried surfaces and slight strength;
the mixed solution of spray water and triethanolamine used for spray granulation is prepared from the following components in a mass ratio of the triethanolamine to the water of 1: 0.15.
s2: uniformly stirring and mixing the dead burned MgO, ammonium dihydrogen phosphate, potassium dihydrogen phosphate, borax, diammonium hydrogen phosphate, dipotassium hydrogen phosphate and water to obtain a water solution; and sequentially spraying the aqueous solution and the curing agent to the surface of the porous layer granulation surface which is not completely dried and has slight strength by using a high-pressure sprayer, and curing and drying to obtain the aggregate.
In step S2: the ratio of the amount of the water to the sum of the dead burned MgO, ammonium dihydrogen phosphate, potassium dihydrogen phosphate, borax, diammonium hydrogen phosphate and dipotassium hydrogen phosphate is 0.3: 1;
the maintenance treatment is carried out in a standard maintenance room; the time of the maintenance treatment is 24 hours;
the temperature of the drying treatment is 100-200 ℃.
Example 2
The present embodiment provides an aggregate comprising a core material, a porous layer material, and a ceramic layer structure material;
the core material is walnut shell solid particles and/or corn flour solid particles;
the porous layer material comprises the following components in parts by weight: 5 portions of cement and 25 portions of active component (fly ash, active blast furnace)30 parts of slag, 15 parts of silica fume, 3 parts of kaolin, 0.5 part of stone powder, an excitant (1 part of sodium sulfate, 1 part of sodium silicate, 1 part of quicklime and 1 part of triethanolamine), a balling agent (2 parts of polyvinyl alcohol and 2 parts of bentonite), a dispersant (3 parts of sodium tripolyphosphate and 3 parts of polycarboxylate), 3 parts of xanthan gum and K20.25 part of O;
the ceramic layer structure material comprises the following components in parts by weight: 40 parts of dead burned MgO, 40 parts of ammonium dihydrogen phosphate, 15 parts of potassium dihydrogen phosphate, 1 part of borax, 2 parts of diammonium hydrogen phosphate, 2 parts of dipotassium hydrogen phosphate and 8 parts of acrylic emulsion.
The mass ratio of the core material to the porous layer material to the ceramic layer structure material is 0.5: 1: 1.2.
example 3
The present embodiment provides an aggregate comprising a core material, a porous layer material, and a ceramic layer structure material;
the core material is walnut shell solid particles and/or corn flour solid particles;
the porous layer material comprises the following components in parts by weight: 7 parts of cement, active components (20 parts of fly ash, 30 parts of active blast furnace slag, 15 parts of silica fume, 4 parts of kaolin), an excitant (3 parts of quicklime and 2 parts of gypsum), a balling agent (5 parts of polyvinyl alcohol, 2 parts of bentonite, 2 parts of polyethylene glycol and 2 parts of starch), a dispersing agent (5 parts of sodium tripolyphosphate), 3 parts of xanthan gum and K20.25 part of O;
the ceramic layer structure material comprises the following components in parts by weight: 45 parts of dead burned MgO, 30 parts of ammonium dihydrogen phosphate, 15 parts of potassium dihydrogen phosphate, 2 parts of borax, 4 parts of diammonium hydrogen phosphate, 4 parts of dipotassium hydrogen phosphate and 10 parts of acrylic emulsion.
The mass ratio of the core material to the porous layer material to the ceramic layer structure material is 0.4: 1: 1.1;
the aggregate of this example was prepared in a manner comparable to that of example 1, except that: in step S2, the ratio of the amount of water to the sum of the dead burned MgO, ammonium dihydrogen phosphate, potassium dihydrogen phosphate, borax, diammonium hydrogen phosphate, and dipotassium hydrogen phosphate is 0.2: 1.
example 4
The present embodiment provides an aggregate comprising a core material, a porous layer material, and a ceramic layer structure material;
the core material is walnut shell solid particles and/or corn flour solid particles;
the porous layer material comprises the following components in parts by weight: 5 parts of cement, active components (20 parts of fly ash, 23 parts of active blast furnace slag, 15 parts of silica fume, 3 parts of kaolin, 0.5 part of stone powder), an excitant (3 parts of quicklime, 2 parts of gypsum, 2 parts of sodium sulfate and 2 parts of triethanolamine), a balling agent (3 parts of bentonite, 2 parts of polyvinyl alcohol and 2 parts of starch), a dispersing agent (5 parts of sodium tripolyphosphate and 3 parts of polycarboxylate), 5 parts of xanthan gum and K20.25 part of O;
the ceramic layer structure material comprises the following components in parts by weight: 55 parts of dead burned MgO, 30 parts of ammonium dihydrogen phosphate, 10 parts of potassium dihydrogen phosphate, 1 part of borax, 3 parts of diammonium hydrogen phosphate, 1 part of dipotassium hydrogen phosphate and 10 parts of acrylic emulsion.
The dosage ratio of the core material, the porous layer material and the ceramic layer structure material is 0.5: 1: 1.1.
example 5
The present embodiment provides a gypsum-based self-leveling mortar composition, which includes the following components in parts by weight: 20 parts of aggregate, 21.66 parts of sand, 55 parts of desulfurized gypsum powder, 0.1 part of defoaming agent, 0.2 part of water reducing agent, 0.01 part of suspending agent and 0.03 part of gypsum retarder.
The preparation method of the gypsum-based self-leveling mortar composition comprises the following steps: the aggregate, the sand, the desulfurized gypsum powder, the defoaming agent, the water reducing agent, the suspending agent and the gypsum retarder which are described in the embodiment 4 are uniformly stirred in a dry mixer and then are stirred with a proper amount of water to obtain the gypsum-based self-leveling mortar composition.
Example 6
The present embodiment provides a gypsum-based self-leveling mortar composition, which includes the following components in parts by weight: 25 parts of aggregate, 21.65 parts of sand, 50 parts of desulfurized gypsum powder, 0.1 part of defoamer, 0.2 part of water reducer, 0.02 part of suspending agent and 0.27 part of gypsum retarder, which are described in example 4.
The preparation method of the gypsum-based self-leveling mortar composition comprises the following steps: the aggregate, the sand, the desulfurized gypsum powder, the defoaming agent, the water reducing agent, the suspending agent and the gypsum retarder which are described in the embodiment 4 are uniformly stirred in a dry mixer and then are stirred with a proper amount of water to obtain the gypsum-based self-leveling mortar composition.
Test example 1
In the test example, GB/T14684-. As can be seen from table 1, the aggregate of the present invention is relatively stable in performance compared to conventional aggregates.
TABLE 1
| Item | Index (es) | 1 | 2 | 3 | 4 |
| Bulk density kg/m3 | ≤1000 | 660 | 680 | 701 | 720 |
| Barrel pressure strength/MPa | ≥2 | 4.5 | 5.6 | 6.7 | 5.2 |
| Percent breakage/28 MPa | ≤5％ | 5.0 | 4.5 | 4.8 | 4.9 |
| Water absorption/%) | ≤8％ | 7.0 | 6.4 | 5.2 | 6.1 |
| Sphericity/% | ≥90 | 91 | 93 | 95 | 92 |
Test example 2
In this test example, the gypsum-based self-leveling mortar composition described in example 5 was subjected to setting time, bending resistance, compression resistance, and drawing performance tests, and the test results are shown in table 2. Wherein, the test method of the test example adopts a standard method of JC/T1023-2021 gypsum-based self-leveling mortar.
TABLE 2
| Example 5 | Example 6 | |
| Water addition amount/%) | 42 | 41 |
| Initial fluidity/mm | 145 | 144 |
| 30min fluidity/mm | 143 | 142 |
| Initial setting time/min | 110 | 108 |
| Final setting time/min | 120 | 118 |
| 1d flexural strength/MPa | 3.1 | 3.2 |
| 1d compressive strength/MPa | 7.8 | 7.7 |
| 28d absolute dry flexural strength/MPa | 7.4 | 7.5 |
| 28d absolute dry compressive strength/MPa | 25.6 | 26.2 |
| 28d Absolute Dry tensile Strength/MPa | 1.50 | 1.6 |
As can be seen from the data in table 2, in the mortar composition of example 5, the occupancy of aggregate in place of sand is 50%, which greatly meets JC/T1023-2021 "gypsum-based self-leveling mortar" standard, the initial fluidity is 145, the fluidity after 30min is 142, the slump loss is only 2mm, and meets the standard requirements, and the flexural strength of 1d exceeds 1.55 times of the standard, the compressive strength of 1d exceeds 1.3 times of the standard, the flexural strength of 28d exceeds 1.23 times of the standard, the compressive strength of 28d exceeds 1.28 times of the standard, and no cracking phenomenon occurs, which indicates that the aggregate has good suitability in the formulation of the gypsum-based self-leveling mortar composition.
The fluidity loss and strength rules of the embodiment 6 and the embodiment 5 are basically consistent, and the aggregate can also be shown to have excellent suitability in gypsum-based self-leveling mortar.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (10)
1. A gypsum-based self-leveling mortar composition, comprising:
aggregating;
sand;
desulfurized gypsum powder;
cement;
an auxiliary agent;
the aggregate includes a core material, a porous layer material, and a ceramic layer structure material.
2. The gypsum-based self-leveling mortar composition according to claim 1, wherein the mortar composition comprises the following components in parts by weight: 10-30 parts of aggregate, 20-30 parts of sand, 50-60 parts of desulfurized gypsum powder, 1-5 parts of cement and 0.1-0.5 part of auxiliary agent.
3. The gypsum based self-levelling mortar composition according to claim 1 or 2, wherein the auxiliaries comprise the following components in parts by weight: 0.05-0.15 part of defoaming agent, 0.1-0.25 part of water reducing agent, 0.001-0.05 part of suspending agent and 0.01-0.05 part of gypsum retarder.
4. The gypsum-based self-leveling mortar composition according to claim 3, wherein the sand has a bulk density of 900-1500kg/m3。
5. The gypsum-based self-leveling mortar composition according to claim 3, wherein,
the core material is walnut shell solid particles and/or corn flour solid particles;
the porous layer material comprises: cement, active ingredients, an activator, a balling agent, a dispersant, a migration agent and xanthan gum;
the ceramic layer structure material comprises: dead burned MgO, soluble dihydric phosphate, borax, soluble hydrogen phosphate and a curing agent.
6. The gypsum-based self-leveling mortar composition of claim 5, wherein,
the dosage ratio of the core material, the porous layer material and the ceramic layer structure material is (0.1-1.2): 1: (2-3);
the porous layer material comprises the following components in parts by weight: 1-10 parts of cement, 50-120 parts of active component, 1-10 parts of activator, 1-10 parts of balling agent, 1-10 parts of dispersant, 0-3 parts of migration agent and 1-10 parts of xanthan gum;
the ceramic layer structure material comprises the following components in parts by weight: 20-80 parts of dead burned MgO, 10-60 parts of soluble dihydric phosphate, 0.5-4 parts of borax, 1-10 parts of soluble hydrogen phosphate and 5-10 parts of curing agent.
7. The gypsum-based self-leveling mortar composition according to claim 5 or 6, wherein,
the active components comprise the following components in parts by weight: 30-50 parts of fly ash, 10-30 parts of active blast furnace slag, 10-20 parts of silica fume, 1-10 parts of kaolin and 0-1 part of stone powder;
the excitant is at least one of quicklime, gypsum, calcium hydroxide, sodium silicate, sodium sulfate and triethanolamine;
the balling agent is at least one of polyvinyl alcohol, polyethylene glycol, starch and bentonite;
the dispersing agent is at least one of sodium pyrophosphate, sodium tripolyphosphate, sodium hexametaphosphate and polycarboxylate;
the migration agent is an alkali metal oxide, preferably K2O and/or Na2O；
The curing agent is at least one of acrylic emulsion, epoxy emulsion and VAE emulsion;
the soluble dihydrogen phosphate is potassium dihydrogen phosphate and/or ammonium dihydrogen phosphate;
the soluble hydrogen phosphate is dipotassium hydrogen phosphate and/or diammonium hydrogen phosphate.
8. The gypsum based self-levelling mortar composition according to claim 5 or 6, wherein the aggregate is prepared by a method comprising the steps of:
s1: uniformly stirring and mixing the cement, the active component, the exciting agent, the balling agent, the dispersing agent, the xanthan gum and the optional migration agent, and drying and screening to obtain the porous layer material; mixing the porous layer material with the core material for spray granulation to obtain porous layer granules with the surface not completely dried;
s2: stirring and mixing the dead burned MgO, the soluble dihydric phosphate, the borax, the soluble hydrogen phosphate and the water uniformly to obtain an aqueous solution; and spraying the aqueous solution and the curing agent on the surface of the porous layer granulation surface which is not completely dried in sequence, and curing and drying to obtain the aggregate.
9. The gypsum-based self-leveling mortar composition according to claim 8, wherein, in step S1,
the temperature of the drying treatment is 100-200 ℃;
the spray used for carrying out the spray granulation is water or a mixed solution of water and triethanolamine;
preferably, the mass ratio of the triethanolamine to the water is 1: (0.15-0.3).
10. The gypsum-based self-leveling mortar composition according to claim 8, wherein, in step S2,
the ratio of the mass of the water to the sum of the mass of the dead burned MgO, the soluble dihydric phosphate, the borax and the soluble hydrogen phosphate is (0.1-0.3): 1;
the curing treatment is carried out in a high-temperature high-humidity oxidation kiln or a standard curing chamber; the time of the maintenance treatment is 22-26 h;
the temperature of the drying treatment is 100-200 ℃;
the grain size of the aggregate is 40-140 meshes.
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