CN111848036A - Self-compacting cementing material based on powder quartz physical modification and preparation method thereof - Google Patents
Self-compacting cementing material based on powder quartz physical modification and preparation method thereof Download PDFInfo
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- CN111848036A CN111848036A CN202010703741.1A CN202010703741A CN111848036A CN 111848036 A CN111848036 A CN 111848036A CN 202010703741 A CN202010703741 A CN 202010703741A CN 111848036 A CN111848036 A CN 111848036A
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- 239000010453 quartz Substances 0.000 title claims abstract description 44
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 239000000463 material Substances 0.000 title claims abstract description 36
- 239000000843 powder Substances 0.000 title claims abstract description 23
- 230000004048 modification Effects 0.000 title claims abstract description 15
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 238000002715 modification method Methods 0.000 title description 2
- 238000012986 modification Methods 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 47
- 239000001913 cellulose Substances 0.000 claims description 18
- 235000010980 cellulose Nutrition 0.000 claims description 18
- 229920002678 cellulose Polymers 0.000 claims description 18
- 239000003638 chemical reducing agent Substances 0.000 claims description 18
- 239000010881 fly ash Substances 0.000 claims description 17
- 238000002156 mixing Methods 0.000 claims description 17
- 238000003756 stirring Methods 0.000 claims description 16
- 239000004568 cement Substances 0.000 claims description 13
- 239000004576 sand Substances 0.000 claims description 13
- 239000004575 stone Substances 0.000 claims description 13
- 239000004005 microsphere Substances 0.000 claims description 11
- 239000007822 coupling agent Substances 0.000 claims description 10
- 238000005303 weighing Methods 0.000 claims description 9
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 8
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 6
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 4
- 239000012752 auxiliary agent Substances 0.000 claims description 4
- 239000008367 deionised water Substances 0.000 claims description 4
- 229910021641 deionized water Inorganic materials 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 4
- 239000004094 surface-active agent Substances 0.000 claims description 4
- 239000004408 titanium dioxide Substances 0.000 claims description 4
- FHDQNOXQSTVAIC-UHFFFAOYSA-M 1-butyl-3-methylimidazol-3-ium;chloride Chemical compound [Cl-].CCCCN1C=C[N+](C)=C1 FHDQNOXQSTVAIC-UHFFFAOYSA-M 0.000 claims description 2
- 229920000168 Microcrystalline cellulose Polymers 0.000 claims description 2
- PRXRUNOAOLTIEF-ADSICKODSA-N Sorbitan trioleate Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OC[C@@H](OC(=O)CCCCCCC\C=C/CCCCCCCC)[C@H]1OC[C@H](O)[C@H]1OC(=O)CCCCCCC\C=C/CCCCCCCC PRXRUNOAOLTIEF-ADSICKODSA-N 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims description 2
- 239000002608 ionic liquid Substances 0.000 claims description 2
- 235000019813 microcrystalline cellulose Nutrition 0.000 claims description 2
- 239000008108 microcrystalline cellulose Substances 0.000 claims description 2
- 229940016286 microcrystalline cellulose Drugs 0.000 claims description 2
- 238000012216 screening Methods 0.000 claims description 2
- 238000007873 sieving Methods 0.000 claims description 2
- 238000002791 soaking Methods 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 4
- 239000011376 self-consolidating concrete Substances 0.000 abstract description 4
- 239000004567 concrete Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 4
- 239000002893 slag Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000005495 investment casting Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011859 microparticle Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000011044 quartzite Substances 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000010187 selection method Methods 0.000 description 1
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
- C04B28/04—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
- 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
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a self-compacting cementing material based on powder quartz physical modification and a preparation method thereof, belonging to the technical field of self-compacting concrete. The invention improves the activity of the powdered quartz by modifying the powdered quartz, and can obviously improve the fluidity and the expansion degree of the self-compacting cementing material and the strength of the self-compacting cementing material when being added into the self-compacting cementing material.
Description
Technical Field
The invention relates to the technical field of self-compacting concrete, in particular to a self-compacting cementing material based on powder quartz physical modification and a preparation method thereof.
Background
The natural powdered quartz is formed by the weathering fragmentation of compact quartzite consisting of micro-particle quartz (10-30 mu m), generally has high purity and less impurities, can be used without grinding, and is often used as a natural powdered siliceous material to be widely applied to the fields of electrical insulation, water resistance, corrosion resistance, precision investment casting, rubber, plastics, paint body pigments, novel building materials and the like.
Admixtures represented by fly ash and slag powder become indispensable components of concrete, and can obviously improve the working performance of the concrete, improve the strength of the concrete and increase the durability of the concrete. However, with the rapid development of urban construction and the popularization of pumping concrete in China, the use amount of fly ash and slag powder is obviously increased, the situation of short supply and demand appears, and commercial concrete enterprises are always worried by the shortage of admixtures. Meanwhile, along with the popularization of machine-made sand application, a large amount of waste stone powder is generated, so that not only is the stacking site occupied, but also the environment is polluted.
If the waste powdered quartz can be used as a concrete admixture to replace increasingly scarce fly ash and expensive slag powder, the method has great practical significance for solving the problem of shortage of raw materials of actual engineering, reducing the construction cost, protecting the environment and the like.
However, since the powdered quartz has a rough surface and many corners, it cannot provide a "ball effect" similar to fly ash, resulting in poor fluidity of concrete and a decrease in the expansion of concrete. The activity of the quartz powder added is low, and the strength of the concrete is also influenced to a certain extent.
Disclosure of Invention
The invention aims to overcome the problems existing when the powdered quartz is used as a material for preparing the self-compacting concrete, and the activity of the powdered quartz is improved by modifying the powdered quartz, so that the self-compacting cementing material based on the physical modification of the powdered quartz is provided, and the self-compacting cementing material contains the following components in percentage by weight:
the material comprises the following raw materials in parts by mass: 1.2 parts of water, 3 parts of broken stone, 5 parts of medium sand, 2.5-3 parts of cement, 1.2-1.6 parts of modified powdered quartz, 0.5 part of fly ash, 0.03 part of water reducing agent and 0.04 part of coupling agent.
Preferably, the water is 1.2 parts, the broken stone is 3 parts, the medium sand is 5 parts, the cement is 2.7 parts, the modified quartz powder is 1.4 parts, the fly ash is 0.5 part, the water reducing agent is 0.03 part, and the coupling agent is 0.04 part.
The crushed stone has a particle size of 5-20mm and an apparent density of 2.95g/cm3Bulk density of 1.42g/cm3The water absorption was 0.46%.
The cement is P042.5 ordinary portland cement, and the apparent density is 3.20 g/cm 3.
The medium sand is river sand, and the bulk density of the medium sand is 1.50g/cm3The apparent density was 2.61g/cm3The water content was 0.30%.
The water reducing agent is a polycarboxylic acid high-efficiency water reducing agent.
The fly ash is I-grade fly ash, and the apparent density is 2.05 g/cm 3。
The process method for preparing the modified powdered quartz comprises the following steps:
1. preheating and drying the powdered quartz for 60 minutes at the drying temperature of 90-110 ℃.
2. According to the ammonia water dosage which is one thousandth of the quartz dosage, the ammonia water: and (3) preparing a modification auxiliary agent according to the proportion of water =1: 3.
3. Preparation of a coupling agent: 1) Adding 3-5 parts by weight of microcrystalline cellulose into 100 parts by weight of 1-butyl-3-methylimidazolium chloride ionic liquid, stirring and mixing at the temperature of 95-100 ℃ and the stirring speed of 100-200 rpm to obtain a cellulose solution; 2) adding titanium dioxide into the cellulose solution at the temperature of 80-90 ℃, uniformly mixing, and stirring for 30-40 minutes at the rotating speed of 100-200 rpm, wherein the mass of the titanium dioxide is 0.2 times that of the cellulose solution; 3) adding a surfactant Span85 at 90-100 ℃, wherein the mass of the surfactant is 0.3 time of that of the cellulose solution, stirring at 700-900 rpm for 20 minutes, cooling to 30 ℃ at the rate of 5 ℃ per 10 minutes, and condensing the cellulose solution into balls; 4) adding a curing agent acetone, reducing the rotating speed to 200rpm, keeping stirring for 20 minutes, and quickly curing the cellulose solution to form cellulose microspheres; 5) filtering the microspheres out of the reaction solution, washing with deionized water with 2 times of volume for 35 times, and then soaking the microspheres in the deionized water for 48 hours; 6) and (4) carrying out wet sieving on the cellulose microspheres, and collecting the cellulose microspheres.
4. Putting the powdered quartz prepared in the step (1) into a ball mill, adding the modified auxiliary agent ammonia water solution prepared in the step (2), and simultaneously adding the coupling agent prepared in the step (3), and carrying out mechanical physical modification at the modification temperature of 100 ℃ and 120 ℃ for 60 minutes.
5. Discharging the modified powder quartz prepared in the step (4), and screening out the polymeric particles in the modified powder.
Another object of the present invention is to provide a method for preparing a self-compacting cementitious material, comprising the steps of:
(1) weighing a certain amount of broken stone and modified quartz powder according to the mixing proportion and uniformly mixing;
(2) weighing a certain amount of cement and fly ash according to the mixing proportion and uniformly mixing;
(3) adding the uniformly mixed materials in the step (2) into the uniformly mixed materials in the step (1), and uniformly mixing to obtain a mixture;
(4) weighing a certain amount of water reducing agent, and dissolving in a certain amount of water to obtain a water solution of the water reducing agent;
(5) and (4) adding the water solution of the water reducing agent in the step (4) into the mixture, and uniformly stirring to obtain the self-compacting cementing material.
Compared with the prior art, the invention has the advantages that:
1. the self-compacting cementing material provided by the invention comprises modified powdered quartz besides common cement, crushed stone, medium sand and water, and the prepared self-compacting cementing material has the advantages that the flowability, filling property, segregation resistance, time loss and strength meet related requirements.
2. The method adopts the modified powdered quartz to replace part of the natural coarse aggregate to prepare the self-compacting cementing material, can effectively solve the problem that quartz tailings produced in quartz mining harm the environment, changes waste into valuable, is green and environment-friendly, saves resources, reduces the production cost of the self-compacting cementing material with the same strength and the same proportion, accords with the national sustainable development concept, and is suitable for industrial production.
Detailed Description
The technical solution of the present invention is further described with reference to the following specific embodiments.
Example 1
A self-compacting cementing material based on powder quartz physical modification is prepared from the following components: 120kg of water, 300kg of broken stone, 500kg of medium sand, 250kg of cement, 160kg of modified quartz powder, 50kg of fly ash, 3kg of water reducing agent and 4kg of coupling agent. Wherein the crushed stone has a particle size of 5-20mm and an apparent density of 2.95g/cm3Bulk density of 1.42 g/cm3Water absorption of 0.46%; the cement is P042.5 ordinary Portland cementThe current density is 3.20 g/cm3(ii) a The medium sand is river sand with a bulk density of 1.50g/cm3The apparent density was 2.61g/cm3The water content is 0.30%; the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent; the fly ash is I-grade fly ash, and the apparent density is 2.05 g/cm 3。
The preparation method comprises the following steps:
(1) weighing 300kg of broken stone and 140kg of modified quartz powder, and uniformly stirring and mixing;
(2) weighing 270kg of cement and 50kg of fly ash, and uniformly stirring and mixing;
(3) adding the uniformly mixed material obtained in the step (2) into the uniformly mixed material obtained in the step (1), and stirring and uniformly mixing to obtain a mixture;
(4) weighing 3kg of water, and dissolving the water in a certain amount of 120kg of water to obtain a water solution of the water reducing agent;
(5) and (4) adding the water solution of the water reducing agent in the step (4) into the mixture, and uniformly stirring to obtain the self-compacting cementing material.
Example 2
A self-compacting cementing material based on powder quartz physical modification is prepared from the following components: 120kg of water, 300kg of broken stone, 500kg of medium sand, 300kg of cement, 110kg of modified quartz powder, 50kg of fly ash, 3kg of water reducing agent and 4kg of coupling agent. The material selection and preparation method are the same as in example 1.
Test results
The following performance tests were carried out on the self-compacting cements prepared according to the methods of examples 1 and 2, according to the "self-compacting concrete application protocol JGJ/T283-2012
| Examples | Slump spread (mm) | J Ring extension (mm) | T500Test (S) | Isolation Rate test (%) | fcn,28（MPa） |
| 1 | 692 | 679 | 4.30 | 14.81 | 68.2 |
| 2 | 675 | 675 | 4.22 | 15.26 | 71.8 |
The test result proves that the self-compacting cementing material produced by using the modified powdered quartz as one of the raw materials meets the national standard requirements.
Claims (4)
1. A self-compacting cementing material based on powder quartz physical modification is characterized in that the self-compacting cementing material contains the following components: the material comprises the following raw materials in parts by mass: 1.2 parts of water, 3 parts of broken stone, 5 parts of medium sand, 2.5-3 parts of cement, 1.2-1.6 parts of modified powdered quartz, 0.5 part of fly ash, 0.03 part of water reducing agent and 0.04 part of coupling agent.
2. The self-compacting cementing material based on the physical modification of powdered quartz as claimed in claim 1, characterized in that the water is 1.2 parts, the crushed stone is 3 parts, the medium sand is 5 parts, the cement is 2.7 parts, the modified powdered quartz is 1.4 parts, the fly ash is 0.5 part, the water reducing agent is 0.03 part, and the coupling agent is 0.04 part.
3. The self-compacting cementing material based on the physical modification of the powdered quartz as claimed in claim 1, wherein the preparation method of the modified powdered quartz is as follows:
(1) preheating and drying the powdered quartz for 60 minutes at the drying temperature of 90-110 ℃;
(2) according to the ammonia water dosage which is one thousandth of the quartz dosage, the ammonia water: preparing a modifying auxiliary agent according to the proportion of water =1: 3;
(3) Preparation of a coupling agent: adding 3-5 parts by weight of microcrystalline cellulose into 100 parts by weight of 1-butyl-3-methylimidazolium chloride ionic liquid, stirring and mixing at the temperature of 95-100 ℃ and the stirring speed of 100-200 rpm to obtain a cellulose solution; 2) adding titanium dioxide into the cellulose solution at the temperature of 80-90 ℃, uniformly mixing, and stirring for 30-40 minutes at the rotating speed of 100-200 rpm, wherein the mass of the titanium dioxide is 0.2 times that of the cellulose solution; 3) adding a surfactant Span85 at 90-100 ℃, wherein the mass of the surfactant is 0.3 time of that of the cellulose solution, stirring at 700-900 rpm for 20 minutes, cooling to 30 ℃ at the rate of 5 ℃ per 10 minutes, and condensing the cellulose solution into balls; 4) adding a curing agent acetone, reducing the rotating speed to 200rpm, keeping stirring for 20 minutes, and quickly curing the cellulose solution to form cellulose microspheres; 5) filtering the microspheres out of the reaction solution, washing the microspheres for 3 to 5 times by using deionized water with 2 times of volume, and then soaking the microspheres in the deionized water for 48 hours; 6) wet sieving the cellulose microspheres, and collecting the cellulose microspheres;
(4) putting the powder quartz prepared in the step) into a ball mill, adding the modified auxiliary agent ammonia water solution prepared in the step (2), and simultaneously adding the coupling agent prepared in the step (3), and carrying out mechanical physical modification at the modification temperature of 100 ℃ and 120 ℃ for 60 minutes;
(5) Discharging the modified powder quartz prepared in the step (4), and screening out the polymeric particles in the modified powder.
4. A preparation method of a self-compacting cementing material is characterized by comprising the following steps:
(1) weighing a certain amount of broken stone and modified quartz powder according to the mixing proportion and uniformly mixing;
(2) weighing a certain amount of cement and fly ash according to the mixing proportion and uniformly mixing;
(3) adding the uniformly mixed materials in the step (2) into the uniformly mixed materials in the step (1), and uniformly mixing to obtain a mixture;
(4) weighing a certain amount of water reducing agent, and dissolving in a certain amount of water to obtain a water solution of the water reducing agent;
(5) and (4) adding the water solution of the water reducing agent in the step (4) into the mixture, and uniformly stirring to obtain the self-compacting cementing material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010703741.1A CN111848036A (en) | 2020-07-21 | 2020-07-21 | Self-compacting cementing material based on powder quartz physical modification and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010703741.1A CN111848036A (en) | 2020-07-21 | 2020-07-21 | Self-compacting cementing material based on powder quartz physical modification and preparation method thereof |
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| CN111848036A true CN111848036A (en) | 2020-10-30 |
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| CN202010703741.1A Pending CN111848036A (en) | 2020-07-21 | 2020-07-21 | Self-compacting cementing material based on powder quartz physical modification and preparation method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1749803A1 (en) * | 2005-07-28 | 2007-02-07 | Eerland Operations B.V. | Concrete composition |
| CN101612540A (en) * | 2009-08-06 | 2009-12-30 | 浙江大学 | A kind of method that uses ionic liquid as solvent to prepare cellulose microsphere |
| CN109320163A (en) * | 2018-10-30 | 2019-02-12 | 中建西部建设西南有限公司 | Low glue material self-compacting concrete of a kind of C30 and preparation method thereof |
| CN109553435A (en) * | 2018-12-07 | 2019-04-02 | 徐州市万达石英有限公司 | A kind of preparation method of 3D printer quartz sand |
| CN110395955A (en) * | 2019-08-01 | 2019-11-01 | 西安新意达建筑制品有限公司 | A kind of impervious freeze thawing resistance self-compacting concrete and preparation method thereof |
-
2020
- 2020-07-21 CN CN202010703741.1A patent/CN111848036A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1749803A1 (en) * | 2005-07-28 | 2007-02-07 | Eerland Operations B.V. | Concrete composition |
| CN101612540A (en) * | 2009-08-06 | 2009-12-30 | 浙江大学 | A kind of method that uses ionic liquid as solvent to prepare cellulose microsphere |
| CN109320163A (en) * | 2018-10-30 | 2019-02-12 | 中建西部建设西南有限公司 | Low glue material self-compacting concrete of a kind of C30 and preparation method thereof |
| CN109553435A (en) * | 2018-12-07 | 2019-04-02 | 徐州市万达石英有限公司 | A kind of preparation method of 3D printer quartz sand |
| CN110395955A (en) * | 2019-08-01 | 2019-11-01 | 西安新意达建筑制品有限公司 | A kind of impervious freeze thawing resistance self-compacting concrete and preparation method thereof |
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Application publication date: 20201030 |