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WO2020206650A1 - Composition cimentaire à développement rapide de force d'adhérence à la traction - Google Patents

Composition cimentaire à développement rapide de force d'adhérence à la traction Download PDF

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Publication number
WO2020206650A1
WO2020206650A1 PCT/CN2019/082236 CN2019082236W WO2020206650A1 WO 2020206650 A1 WO2020206650 A1 WO 2020206650A1 CN 2019082236 W CN2019082236 W CN 2019082236W WO 2020206650 A1 WO2020206650 A1 WO 2020206650A1
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WIPO (PCT)
Prior art keywords
cementitious composition
tiles
cement
composition according
present
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.)
Ceased
Application number
PCT/CN2019/082236
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English (en)
Inventor
Qing Liu
Zhijie CEN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sika Technology AG
Original Assignee
Sika Technology AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sika Technology AG filed Critical Sika Technology AG
Priority to PCT/CN2019/082236 priority Critical patent/WO2020206650A1/fr
Priority to CN202010277456.8A priority patent/CN111807793A/zh
Publication of WO2020206650A1 publication Critical patent/WO2020206650A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • C04B28/02—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
    • C04B28/06—Aluminous cements
    • C04B28/065—Calcium aluminosulfate cements, e.g. cements hydrating into ettringite
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F13/00—Coverings or linings, e.g. for walls or ceilings
    • E04F13/07—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor
    • E04F13/08—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F13/00—Coverings or linings, e.g. for walls or ceilings
    • E04F13/07—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor
    • E04F13/08—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements
    • E04F13/0885—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements specially adapted for being adhesively fixed to the wall; Fastening means therefor; Fixing by means of plastics materials hardening after application
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/02—Flooring or floor layers composed of a number of similar elements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • 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
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00637—Uses not provided for elsewhere in C04B2111/00 as glue or binder for uniting building or structural 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
    • C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
    • 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
    • C04B2111/72—Repairing or restoring existing buildings or building 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding

Definitions

  • the invention relates to a cementitious compositions with fast development of tensile adhesive strength.
  • the compositions are suitable to be used as adhesive, especially as tile adhesive for rapid tiling and repair.
  • the invention relates to a structure, in particular a floor, a wall or a ceiling, comprising a cover element, in particular a tile, whereby the cover element is fixed to the structure with a cementitious composition.
  • Cementitious compositions for example cementitious tile adhesives or grouts
  • a rapid development of tensile adhesive strength for example of a tile adhesive, allows for a faster time to traffic after application. A faster time to traffic is desirable as this leads to faster construction and less downtime.
  • the performance and hardening characteristics are directly related to the formulation of such cementitious compositions.
  • Most cementitious compositions based on Ordinary Portland Cement (OPC) result in materials with regular hardening characteristics.
  • Cementitious compositions based on calcium aluminate cement (CAC) and/or calcium sulphoaluminate (CSA) cements result in materials with faster hardening characteristics and therefore faster time to traffic.
  • Standard CSA cements show rapid development of strength. However, to produce standard CSA cement, raw materials of high quality are needed such as bauxite, gypsum, and limestone.
  • An alternative is high-belite CSA cement which can be manufactured from raw materials of lower quality such as fly ash and FGD gypsum.
  • high-belite CSA cement does not show the same rapid development of strength as standard CSA.
  • CN 106396563 discloses a composition based on a white, quick-dry, low-alkali cement which may be selected from aluminate cement, sulphoaluminate cement, and high-belite cement.
  • aluminate cement and sulphoaluminate cement show rapid hardening and high early strength
  • a standard CSA cement with high-belite content shows slower hydration and lower early strength as well as higher volume change in the long-term, all of which is similar to OPC as explained above.
  • US 10029944 discloses a mortar composition based on a CAC slurry which may be activated by a solution of NaOH which is supersaturated with Li 2 CO 3 .
  • a solution of NaOH which is supersaturated with Li 2 CO 3 .
  • One problem is that the applicator has to handle solutions of NaOH which are highly alkaline and pose risks in terms of occupational health and safety.
  • CN 108675734 discloses a tile adhesive based on a binary binder system comprising a quick-hardening cement and gypsum.
  • a binary binder system comprising a quick-hardening cement and gypsum.
  • CN106277981 discloses a composition suitable as tile adhesive comprising a cement with fast setting properties and fly ash as a filler.
  • the type of cement is not further specified and the use of fly ash as filler poses problems with fast development of tensile adhesive strength which is required for tile adhesives for examples by Chinese standard JC/T 547-2005 or European standard EN1348.
  • composition according to claim 1 can solve the problem of rapid development of tensile adhesion strength.
  • the object of the present invention is thus a cementitious composition
  • a cementitious composition comprising:
  • additives selected form the group consisting of plasticizers, superplasticizers, rheology modifiers, thickeners, air-entrainers, de-aerating agents, defoamers, corrosion inhibitors, fibers, expansion producing additives, pigments, accelerators, retarders, strength enhancers, in particular early strength enhancers, waterproofing additives, alkali-aggregate reaction inhibitors, chromate reducers, and/or anti-microbial agents,
  • cementitious composition according to the present invention can be used as a tile adhesive, especially an adhesive for ceramic tiles, with rapid development of tensile adhesive strength for the laying and/or repair of tiles.
  • a cementitious composition according to the present invention thus develops a tensile adhesive strength of >0.5 MPa within the first 24h, preferably within the first 6h after addition of mixing water when measured according to Chinese standard JC/T 547-2017.
  • Such rapid development of tensile adhesive strength allows for a faster release of a tiled surface for further work and/or traffic.
  • the tensile adhesive strength of a composition of the present invention is >0.5 MPa, also after heat ageing and water immersion according to Chinese standard JC/T 547-2017. Such performance is proof for good durability and long service life.
  • the cementitious composition in particular in dry state, is mixed with an appropriate amount of water. After this, the tile adhesive is ready for tiling or other applications.
  • a cementitious composition according to the present invention applied with an open time of 20 min has a tensile adhesive strength after 28d of curing of at least 60%of the tensile adhesive strength of the same composition when measured after an open time of 10 min and subsequently cured for 28d under the same conditions.
  • Such performance is important for a reasonable application, especially in a tiling process.
  • composition of the present invention are excellent workability, adjustable open time, reduced efflorescence, good slip resistance, and low shrinkage.
  • Low shrinkage is an advantage as a higher shrinkage will lead to cracking of a cured cementitious material.
  • a cementitious composition of the present invention is thus suitable as a mortar in construction applications. It is especially suitable as a tile adhesive for laying and/or repair of tiles, especially of ceramic tiles. It can further be suitable as rapid repair mortar, for grouting applications, as self-levelling product for floor applications, as screed, render or water plug as well as for waterproofing or fireproofing applications.
  • a cementitious composition, preferably a tile adhesive, of the present invention comprises at least one high-belite calcium sulphoaluminate (CSA) cement.
  • the high-belite CSA cement is present with 20 –64.5 w%, preferably 25 –49.5 w%, especially 30 –40.5 w%, each based on the total weight of the dry composition.
  • a high-belite CSA cement within the context of the present invention is a cement comprising a clinker essentially consisting of the main phases belite C 2 S (2 CaO ⁇ SiO 2 ) , calcium sulphoaluminate C 4 (A 3-x F x ) 3 $ (4 CaO ⁇ 3-x Al 2 O 3 ⁇ x Fe 2 O 3 ⁇ CaSO 4 where x is an integer of from 0 –3) , ferrites such as C 2 F (2 CaO ⁇ Fe 2 O 3 ) , C 2 AF (2 CaO ⁇ Al 2 O 3 ⁇ Fe 2 O 3 ) , C 4 AF (4 CaO ⁇ Al 2 O 3 ⁇ Fe 2 O 3 ) , preferably C 4 AF, and calcium oxide.
  • a high-belite CSA cement comprises a clinker comprising of 37 –47 w%of belite, 20 –35 w%of calcium sulphoaluminate, 3 –9 w%of ferrites, especially of C 4 AF, and 0.5 –4.6 w%of CaO, each related to the total weight of the clinker.
  • a clinker for a high-belite CSA cement of the present invention may comprise other minor phases such as aluminates (CA, C 3 A, C 12 A 7 ) and/or ternesite (C 5 S 2 $) .
  • the high-belite CSA cement additionally comprises up to 35 w%, preferably up to 27 w%, especially up to 15 w%, each based on the total dry weight of the cement, of a calcium sulfate.
  • the calcium sulfate may be present in the form of calcium sulfate-hemihydrate, calcium sulfate-dihydrate and/or anhydrite.
  • the CaSO 4 is present as part of the clinker.
  • a high-belite cement suitable within the context of the present invention, is for example disclosed in EP 3081546.
  • a cement of the present invention may comprise cement improvers chosen from the group consisting of grinding aids, strength improvers, activators, accelerators, fibres, plasticizers, and/or superplasticizers.
  • Cement improvers may be interground with the clinker during milling. They may likewise be admixed to the milled clinker.
  • a high-belite CSA cement of the present invention may comprise other binders in addition to the clinker as described above.
  • These are, in particular, latent hydraulic binders and/or pozzolanic binders.
  • Suitable latent hydraulic and/or pozzolanic binders are, for example, natural pozzolanes, slag, fly ash, silica dust, burned slate and/or limestone.
  • the cementitious binder may contain up to 35 w%, preferably up to 20 w%, especially up to 10 w%, each based on the total dry weight of the cement, of latent hydraulic and/or pozzolanic binders.
  • a too low amount of clinker in a high-belite CSA cement of the present invention leads to less rapid development of tensile adhesion strength.
  • the high-belite CSA cement used belongs to a strength class of 32.5, 42.5, or 52.5 according to DIN EN 197-1. It is especially preferred that the high-belite CSA cement used belongs to a strength class of 42.5 according to DIN EN 197-1.
  • a cementitious composition, preferably a tile adhesive, of the present invention comprises aggregates, preferably sand.
  • Sand is a naturally occurring granular material composed of finely divided rock or mineral particles. It is available in various forms and sizes. Examples of suitable sand are quartz sand, limestone sand, river sand or crushed aggregates. Suitable sand are for example described in standards ASTM C778 or EN 196-1.
  • At least part of the sand used for a cementitious composition of the present invention is quartz sand, river sand, manufactured sand, for example from granite or limestone, or mixtures thereof.
  • river sand is used for a cementitious composition of the present invention, since it is chemically inert, strong, available in various sizes and the workability of the composition can be set advantageously.
  • sand is supplied in different fractions of particles passing through a sieve with clear openings.
  • a suitable method for sieve analysis is for example described in ASTM C136/136M.
  • Sand can thus be characterized by its particle size distribution and the corresponding D-values.
  • the D50 value is the diameter of the particle that 50%of a sample’s mass is smaller than and 50%of a sample’s mass is larger than.
  • the D99 value is the diameter at which 99%of the sample’s mass is comprised of particles with a diameter less than this value.
  • the D1 value for example, is the diameter at which 1%of the sample’s mass is comprised of particles with a diameter less than this value.
  • sand with a D99 value of 1 mm, preferably of 0.8 mm, even more preferred of 0.6 mm, is used for a cementitious composition of the present invention. Larger particles may lead to improper mixing.
  • sand has a particle size D50 from 0.04 to 1 mm, more preferred from 0.05 to 0.8 mm and even more preferred from 0.05 to 0.6 mm.
  • at least part of the sand has a particle size D50 of at least 100 ⁇ m, more preferred at least 200 ⁇ m.
  • sand with a bimodal particle size distribution is used. This can be achieved by mixing two sands with differing particle size distribution and thus different D99 and D1 values.
  • the aggregate used for a cementitious composition of the present invention may consist of 50 –70 w%of sand with a D99 of 0.3 mm and a D1 of 0.1 mm and of 30-50 w%of sand with a D99 of 0.5 mm and a D1 of 0.3 mm, each based on the total dry weight of aggregate.
  • Such granulometry enables an optimized overall particle size distribution for homogeneous mixing, good rheology of the fresh mortar and high strength of the hardened mortar.
  • a cementitious composition of the present invention comprises from 35 –79.5 w%, preferably 50 –74.5 w%, especially 59 –69.5 w%, each based on the total weight of the dry composition, of sand.
  • a cementitious composition, especially a tile adhesive, of the present invention comprises 0.5 –15 w%, preferably 1.0 –10 w%, especially 1.2 –5 w%, each based on the total weight of the dry composition, of a synthetic organic polymer.
  • a synthetic organic polymer within the context of the present invention can be produced by radical polymerization of monomers selected form the group consisting of ethylene, propylene, butylene, isoprene, butadiene, styrene, acrylonitrile, acrylic acid, methacrylic acid, esters of acrylic acid, esters of methacrylic acid, vinylesters, vinylchloride. It is preferred that synthetic polymers are copolymers synthesized from two or more, preferably two, different monomers. The sequence of the copolymer can be alternating, blocked or random.
  • Preferred synthetic organic polymers are copolymers of vinylacetate and ethylene, vinylacetate and ethylene and methylmethacrylate, vinylacetate and ethylene and vinylester, vinylacetate and ethylene and acrylic acid ester, vinylchloride and ethylene and vinyllaureate, vinylacetate and vinylveratate, acrylic ester and styrene, acrylic ester and styrene and butadiene, acrylic ester and acrylonitrile, styrene and butadiene, acrylic acid and styrene, methacrylic acid and styrene, styrene and acrylic acid ester, styrene and methacrylic acid ester.
  • the glass transition temperature (Tg) of said synthetic organic polymers can vary in a wide range.
  • Tg of suitable synthetic organic polmyers can be for example between -50°C and +60°C, preferably between -45°C and +35°C, more preferred between -25°C and +15°C.
  • synthetic organic polymers are used in solid form such as for example redispersible polymer powders.
  • redispersible polymer powders can be manufactured for example by spray drying of polymer dispersions as for example described in patent application EP1042391. Suitable redispersible powders are for example available from Wacker Chemie AG under the trade name Vinnapas.
  • the use of redispersible powders of synthetic organic polymers is preferred for the context of the present invention.
  • redispersible powders comprising vinylacetate-ethylene copolymers with a Tg of -10°C –20°C, preferably 10 –20 °C.
  • a cementitious composition, especially a tile adhesive, of the present invention may comprise up to 5 w%, based on the total weight of the dry composition, of other additives.
  • Such other additives are selected form the group of plasticizers, superplasticizers, rheology modifiers, thickeners, air-entrainers, de-aerating agents, defoamers, corrosion inhibitors, fibers, expansion producing additives, pigments, accelerators, retarders, strength enhancers, in particular early strength enhancers, waterproofing additives, alkali-aggregate reaction inhibitors, chromate reducers, and/or anti-microbial agents.
  • a cementitious composition of the present invention thus additionally comprises
  • At least one thickener selected from starches, modified starches, celluloses, modified celluloses, casein, guar gum, xanthan gum, alginates, tragacanth gum, pectin, amylopectin, dextran, polydextrose, polyvinylalcohols, poly (meth) acrylic acids, polyacrylamides, polyvinylpyrrolidone, and polyethylenglycols,
  • At least one retarder selected from sugar acids, sugars, sugar alcohols, hydroxycarboxylic acids or their salts, phosphates, phosphonates, borates and amines
  • At least one early strength enhancer selected from salts of formic acid, hydrogencarbonates and carbonates,
  • the at least one thickener is a modified cellulose, in particular a methyl cellulose, hydroxypropyl cellulose, hydroxypropyl methyl cellulose, hydroxyethyl cellulose, hydroxyethyl methyl cellulose, hydroxyethyl hydroxypropoyl cellulose, ethylhydroxyethyl cellulose, sodium carboxymethyl cellulose, especially a hydroxypropylcellulose, and the at least one retarder is a hydroxycarboxylic acid or a salt thereof, especially sodium citrate, and the at least one early strength enhancer is an alkali metal or alkaline earth metal carbonate and/or an alkali metal or alkaline earth metal salt of formic acid, especially lithium carbonate and/or calcium formate.
  • a particularly preferred cementitious composition of the present invention, in particular a tile adhesive thus comprises:
  • At least one retarder which is a hydroxycarboxylic acid or their salts, especially sodium citrate
  • At least one early strength enhancer which is selected from lithium carbonate and/or calcium formate
  • a cementitious composition, especially a tile adhesive, of the present invention can be made by mixing the materials as defined above by any process known to the person skilled in the art. There are no particular limitations as to the order of addition for mixing. According to certain embodiments, a cementitious composition, especially a tile adhesive, of the present invention can be made by mixing the materials as defined above in horizontal single shaft mixers, twin shaft paddle mixers, vertical shaft mixers, ribbon blenders, orbiting mixers, change-can mixers, tumbling vessels, vertical agitated chambers or air agitated operations. Mixing can be continuously or batch-wise.
  • the cementitious composition of the present invention is a one-component mixture. That means that all the individual materials and/or substances are intermixed.
  • One-component compositions are in particular easy to handle and exclude the risk of a mix up or wrong dosing of individual components by users.
  • the cementitious composition of the present invention as a two-component or even a multi-component composition.
  • a first component may e.g. be present in a first receptacle comprising the hydraulic binder and the polymer.
  • a second component, present in a second receptacle, may comprise the aggregates. Other distributions are possible as well.
  • Two-or multi-component compositions allow e.g. for adjusting the cementitious composition with regard to specific applications.
  • a cementitious composition of the present invention shows a rapid development of tensile adhesion strength after mixing with water.
  • Water can be added to a cementitious composition of the present invention in a water/cement ratio of between 0.1 –2.0, preferably 0.2 –1.0, more preferably 0.4 –0.9, especially 0.7 –0.9.
  • Water can be any water available such as distilled water, purified water, tap water, mineral water, spring water, and well water.
  • the use of waste water is possible only in cases where the composition of such waste water is known and where none of the impurities contained may impart the functionality of any other component of the composition of the present invention.
  • the use of salt water is not preferred due to its high content of chlorides and the risk of corrosion of steel reinforcement associated therewith.
  • the inventive cementitious compositions are easy to process. Especially, mixed compositions have a consistency, which allows for an application on vertical surfaces and overhanging areas without dripping.
  • a cementitious composition according to the present invention develops a tensile adhesive strength of ⁇ 0.5 MPa within the first 24h, preferably within the first 6h after addition of mixing water when measured according to Chinese standard JC/T 547-2017. Additionally, the tensile adhesive strength of a composition of the present invention is ⁇ 0.5 MPa, especially ⁇ 1.0 also after heat ageing, water immersion and/or freeze-thaw cycles according to Chinese standard JC/T 547-2017. Furthermore, a cementitious composition according to the present invention develops a tensile adhesion strength of ⁇ 0.5 MPa, preferably of ⁇ 1 MPa after an extended open time of 10 minutes, especially after 20 minutes, preferably after 30 minutes.
  • the tensile adhesive strength of a cementitious composition according to the present invention applied with an open time of 20 minutes and after 28d of curing is at least 60%of the tensile adhesive strength of the same composition when measured after an open time of 10 min and subsequently cured for 28d under the same conditions.
  • the rapid development of tensile adhesion strength of a cementitious composition of the present invention significantly reduces the waiting time needed before a surface, especially a tiled surface, can be released for further work or traffic. It is possible, by the use of a cementitious composition of the present invention, to reduce this waiting time ⁇ 48h, preferably ⁇ 24h.
  • the cementitious compositions has good adhesion to different kind of materials, in particular to mortar, concrete, ceramics, wood and metals.
  • the cementitious compositions feature highly beneficial adhesion properties with different types of tiles and veneers.
  • properties according to criteria C2E S2 according to Chinese standard JC/T 547-2017 can be achieved.
  • a cementitious composition according to the present invention is thus particularly useful as tile adhesive.
  • a cementitious composition according to the present invention is used to bond ceramic tiles which can be water-absorbent or non-water-absorbent, such as earthenware tiles, terracotta tiles, fully vitrified tiles, glazed tiles, stoneware tiles or porcelain tiles, as well as cement based tiles and stone tiles, especially natural stone tiles.
  • ceramic tiles which can be water-absorbent or non-water-absorbent, such as earthenware tiles, terracotta tiles, fully vitrified tiles, glazed tiles, stoneware tiles or porcelain tiles, as well as cement based tiles and stone tiles, especially natural stone tiles.
  • a tile adhesive of the present invention is not used to bond artificial tiles which are based on organic polymeric binders.
  • a cementitious composition according to the present invention is used to bond ceramic tiles with a water absorption ⁇ 0.5%as measured according to ASTM C373-18 or EN ISO 10545-3.
  • a cementitious composition of the present invention can thus be used in a process for tiling a surface. Such a process comprises the steps of
  • step 1) of a process of the present invention incudes at least one of the steps of levelling, drying, cleaning the surface from e.g. oil, dust, loose parts, and/or applying a primer to the surface.
  • step 2) of a process of the present invention includes mixing of a cementitious composition of the present invention with water in a water/cement ratio of 0.1 –2.0, preferably 0.2 –1.0, more preferably 0.4 –0.9, especially 0.7 –0.9.
  • Water can be any water available such as distilled water, purified water, tap water, mineral water, spring water, and well water. Mixing can be continuously or batch-wise for example by a hand held agitator, a Hobart mixer, a portable concrete mixer, a mixing truck, a mixing bucket, a paddle mixer, a jet mixer, a screw mixer, or an auger mixer.
  • step 3) of a process of the present invention includes application of the cementitious composition of the present invention by means of a spatula, a trowel, preferably a notch trowel, a brush, or in a spray application.
  • the layer thickness in which the cementitious composition of the present invention is applied may vary between 1 -15 mm, preferably between 3 -10 mm.
  • the layer thickness is chosen according to the type of tile to be bonded.
  • step 4) of a process of the present invention is performed within a certain open time from the application of a cementitious composition of the present invention.
  • the open time can vary between 1 -120 min, preferably 5 -90 min, especially 10 -50 min.
  • a cementitious composition of the present invention can also be used in a process for repair of a tiled surface. Such repair may comprise replacement of damaged tiles, injection of a cementitious composition of the present invention under damaged tiles, and grouting of joints.
  • a further aspect of the present invention is a hardened cementitious composition obtainable by adding water to a cementitious composition as described above or obtainable by the method as described above.
  • a further aspect of the present invention relates to a structure, in particular a floor, a wall or a ceiling, comprising support element and a cover element, in particular a tile, whereby the cover element is fixed to the support element with a cementitious composition as described above.
  • the cementitious composition is arranged between the support element of the structure and the cover element.
  • a thickness of the adhesive composition in the structure is from 1 –15 mm, in particular 3 –10 mm.
  • an additional primer layer and/or intermediate layer between the support element and the cementitious composition and/or between the cementitious composition and the cover element might further increase the adhesion between the support element and cover element and/or help to achieve even better noise or vibration suppression.
  • the support element is a floor, a wall or a ceiling made essentially of mortar, concrete, bricks, plaster, metal, plastics and/or wood.
  • the cover element is a tile in the form of a ceramic tile, a stone and/or a veneer.
  • Dry mixes as given in below table 2 were prepared at 23°C and 50%r. h. To prepare dry mixes, the ingredients were weighed into a Hobart N50 mixer and mixed for 2 min at low speed. Dry mixes were used without storage.
  • Tensile adhesion strength was measured according to Chinese standard JC/T 547-2017 after a curing time of 6h and 28 d respectively. Tensile adhesive strength was also measured after 7d of curing and subsequent immersion in water for 21 d at 23 °C. Furthermore, tensile strength was measured after 14d of curing and subsequent heat ageing at 70 °C for 14 d.
  • tensile adhesion strength was measured according to Chinese standard JC/T 547-2017 after 28d of curing, with tiles (P1 ceramic tiles, water absorption 12-18%) applied to the tile adhesive of table 1 within 10 min and 20 min respectively after the addition of mixing water.
  • This time of 10 min and 20 min is referred to as the open time in table 1.
  • the cementitious compositions according to the present invention show a fast development of tensile adhesion strength.
  • a value of ⁇ 0.5 MPa which is required by the relevant standard JC/T 547-2017, was achieved already within 6 hours of curing.
  • the performance after 28d of curing, as well as after subsequent water immersion and heat ageing was also better than required for a C2E S2 classification according to the relevant standard.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Chemical & Material Sciences (AREA)
  • Structural Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Civil Engineering (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

L'article concerne une composition cimentaire à développement rapide de résistance adhésive à la traction. La composition comprend un ciment de sulfoaluminate à teneur élevée en bélite et est appropriée pour une utilisation par exemple en tant qu'adhésif de carreaux pour un pavage et une réparation rapides. L'article fournit ainsi également des procédés pour la pose rapide de carreaux.
PCT/CN2019/082236 2019-04-11 2019-04-11 Composition cimentaire à développement rapide de force d'adhérence à la traction Ceased WO2020206650A1 (fr)

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CN202010277456.8A CN111807793A (zh) 2019-04-11 2020-04-10 具有快速形成拉伸粘附强度的水泥基组合物

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CN113698160A (zh) * 2021-06-16 2021-11-26 上海培宏公路养护技术有限公司 快硬型高性能桥面铺装材料
CN113735534A (zh) * 2021-09-06 2021-12-03 浙江理工大学 可喷射uhtcc及其制备方法及应用
CN114133192A (zh) * 2021-11-29 2022-03-04 上海市建筑科学研究院有限公司 一种机场跑道专用高强快速修补材料

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DE102018110136B3 (de) * 2018-04-26 2019-07-18 Calucem Gmbh Belit-minimierter CSA Zement, Verfahren zur Herstellung von CSA-Zement und Verwendung des CSA Zements

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CN113735534A (zh) * 2021-09-06 2021-12-03 浙江理工大学 可喷射uhtcc及其制备方法及应用
CN114133192A (zh) * 2021-11-29 2022-03-04 上海市建筑科学研究院有限公司 一种机场跑道专用高强快速修补材料

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