CN108455924B - Fine stone micro-expansion self-leveling material and fine stone micro-expansion self-leveling mortar - Google Patents
Fine stone micro-expansion self-leveling material and fine stone micro-expansion self-leveling mortar Download PDFInfo
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- 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
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- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F216/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical
- C08F216/02—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical by an alcohol radical
- C08F216/04—Acyclic compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/06—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals
- C08F283/065—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals on to unsaturated polyethers, polyoxymethylenes or polyacetals
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- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/0068—Ingredients with a function or property not provided for elsewhere in C04B2103/00
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- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/46—Water-loss or fluid-loss reducers, hygroscopic or hydrophilic agents, water retention agents
- C04B2103/465—Water-sorbing agents, hygroscopic or hydrophilic agents
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- 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
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- 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
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- Medicinal Chemistry (AREA)
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- Inorganic Chemistry (AREA)
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Abstract
The invention relates to a fine stone micro-expansion self-leveling material and fine stone micro-expansion self-leveling mortar, belonging to the technical field of building materials, wherein the fine stone micro-expansion self-leveling material is prepared by mixing raw materials comprising 500 parts by weight of portland cement 490-
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a fine stone micro-expansion self-leveling material and fine stone micro-expansion self-leveling mortar.
Background
With the development of social economy and the continuous improvement of user requirements, the common quality problem which is difficult to avoid in the traditional cement mortar ground is difficult to be solved, so that the applicability of the traditional cement mortar ground is difficult to be highlighted. Under the background, people continuously seek a material which is more convenient and easier to control the construction quality, and the ground self-leveling material is produced at the same time.
The Self-leveling material (S L) is a new type ground material made up by using inorganic or organic cementing material as base material, adding proper additive and making improvement, and mixing it with fine sand, etc. said material can be made into the form of fine leveling ground surface by means of Self-gravity action flow, and after the above-mentioned materials are mixed, it can be formed into the invented fine leveling ground surface.
The cement-based self-leveling mortar technology is widely applied in developed countries such as Europe and America, but the research of the type is late in China, the difference is larger compared with that of developed countries abroad at present, and the problems of low early strength, large shrinkage and the like mainly exist. In order to solve the problems, domestic manufacturers mainly adopt a gelling system which mainly comprises aluminate cement and is supplemented with silicate cement and gypsum. Because aluminate cement is expensive, the cost of the prepared self-leveling mortar is high, the cost of large-area use in the building engineering is high, and the self-leveling mortar is not acceptable to users.
Disclosure of Invention
The invention aims to provide a fine stone micro-expansion self-leveling material which adopts a cementing system mainly comprising portland cement, not only reduces the use cost, but also enhances the early strength of fine stone micro-expansion self-leveling mortar and reduces the contraction of the fine stone micro-expansion self-leveling mortar.
The technical purpose of the invention is realized by the following technical scheme: the fine stone micro-expansion self-leveling material is formed by mixing raw materials comprising, by weight, 500 parts of portland cement 490-containing material, 110 parts of fly ash 100-containing material, 640 parts of quartz sand 630-containing material, 925 parts of fine stone 915-containing material, 73-74 parts of an expanding agent and 12-13 parts of a self-leveling water-retaining agent; the self-leveling water retention agent comprises a polymer shown in a formula I, wherein the polymer shown in the formula I has a structural general formula,
wherein a, b and c are 3-4:1-2:5-10, and the average molecular weight of the polymer in the formula I is 200-300 ten thousand.
More preferably, the expanding agent is prepared by mixing raw materials comprising 30-35 parts by weight of gypsum, 40-45 parts by weight of metakaolin, 100-105 parts by weight of dihydrate gypsum powder, 4-6 parts by weight of fluorite powder and 1-10 parts by weight of copolymer of formula II, wherein the structural general formula of the copolymer of formula II is
Wherein d, e and f are the number of the chain links of the copolymer repeating unit of the formula II, d, e and f are 1-2:5-10:1-2, and the average molecular weight of the copolymer of the formula II is 20-100 ten thousand.
More preferably, the portland cement is p.o42.5 portland cement.
Preferably, the quartz sand consists of 40-80 meshes of quartz sand and 80-120 meshes of quartz sand, and the weight ratio of the 40-80 meshes of quartz sand to the 80-120 meshes of quartz sand is 1: 1-1.4.
More preferably, the fine stone has a particle size of 5 to 12 mm.
More preferably, the fly ash is class F class II fly ash.
The invention also provides a fine stone micro-expansion self-leveling material which adopts a cementing system mainly comprising portland cement, so that the use cost is reduced, the early strength is enhanced, and the contractibility is reduced.
The technical purpose of the invention is realized by the following technical scheme:
the fine stone micro-expansion self-leveling mortar is formed by mixing raw materials comprising 175 parts by weight of 170-containing silicate cement, 500 parts by weight of 490-containing silicate cement, 110 parts by weight of 100-containing fly ash, 640 parts by weight of 630-containing quartz sand, 925 parts by weight of 915-containing fine stone, 73-74 parts by weight of an expanding agent and 12-13 parts by weight of a self-leveling water-retaining agent; the self-leveling water retention agent comprises a polymer shown as a formula I, wherein the polymer shown as the formula I has a structural general formula
Wherein a, b and c are 3-4:1-2:5-10, and the average molecular weight of the polymer in the formula I is 200-300 ten thousand.
More preferably, the expanding agent is prepared by mixing raw materials comprising 30-35 parts by weight of gypsum, 40-45 parts by weight of metakaolin, 100-105 parts by weight of dihydrate gypsum powder, 4-6 parts by weight of fluorite powder and 1-10 parts by weight of copolymer of formula II, wherein the structural general formula of the copolymer of formula II is
Wherein d, e and f are the number of the chain links of the copolymer repeating unit of the formula II, d, e and f are 1-2:5-10:1-2, and the average molecular weight of the copolymer of the formula II is 20-100 ten thousand.
Preferably, the quartz sand consists of 40-80 meshes of quartz sand and 80-120 meshes of quartz sand, and the weight ratio of the 40-80 meshes of quartz sand to the 80-120 meshes of quartz sand is 1: 1-1.4; the average particle size of the fine stone is 5-12 mm.
More preferably, the portland cement is p.o42.5 portland cement; the fly ash is F-class II-grade fly ash.
In conclusion, the invention has the following beneficial effects:
firstly, the fine stone micro-expansion self-leveling mortar provided by the invention adopts a gelling system mainly comprising portland cement, so that the use cost is reduced, the early strength is enhanced, and the contractibility is reduced.
Secondly, the self-leveling water-retaining agent prepared by the invention can enhance the early strength and reduce the shrinkage rate of the fine stone micro-expansion self-leveling mortar, and the allyl hydroxyethyl ether monomer, the 1, 4-butylene glycol monomer and the diethylene glycol monovinyl ether monomer play a synergistic role in improving the performance of the self-leveling water-retaining agent.
Thirdly, compared with the expanding agent in the prior art, the expanding agent prepared by the invention can further enhance the early strength of the fine stone micro-expansion self-leveling mortar provided by the invention and reduce the shrinkage rate of the fine stone micro-expansion self-leveling mortar provided by the invention.
Detailed Description
The present invention will be described in further detail with reference to examples. It should be understood that the preparation methods described in the examples are only for illustrating the present invention and are not to be construed as limiting the present invention, and that the simple modifications of the preparation methods of the present invention based on the concept of the present invention are within the scope of the present invention as claimed.
Example 1
Preparing a self-leveling water-retaining agent: 3.06Kg of allyl hydroxyethyl ether monomer, 0.88Kg of 1, 4-butylene glycol monomer, 13.21Kg of diethylene glycol monovinyl ether monomer, 1Kg of formaldehyde and 20Kg of methanol are added into a reaction kettle, 0.1Kg of ammonium persulfate is added as an initiator, the mixture reacts for 5 hours under the conditions of pressure of 0.5MPa and temperature of 105 ℃, and the mixture is purified and dried to obtain the copolymer of formula I with the average molecular weight of 200 ten thousand.
Preparing an expanding agent: adding 1.76Kg of 2, 3, 4, 5, 6-pentahydroxy-2-hexenoic acid-4-lactone monomer, 8.81Kg of 1, 4-butylene glycol monomer, 1.74Kg of 3, 4, 5-trihydroxy-1-cyclohexene-1-formic acid monomer, 1Kg of formaldehyde and 20Kg of methanol into a reaction kettle, adding 0.1Kg of ammonium persulfate as an initiator, reacting for 3 hours under the conditions of 0.5MPa of pressure and 110 ℃, purifying and drying to obtain the copolymer of formula II with the average molecular weight of 20 ten thousand. The expanding agent is prepared by uniformly mixing 30Kg of raw gypsum, 45Kg of metakaolin, 100Kg of dihydrate gypsum powder, 4Kg of fluorite powder and 10Kg of copolymer of formula II.
Preparing a fine stone micro-expansion self-leveling material: the material is prepared by mixing 490Kg of portland cement, 110Kg of fly ash, 630Kg of quartz sand, 920Kg of fine stone, 74Kg of expanding agent and 12Kg of self-leveling water-retaining agent.
Preparing fine stone micro-expansion self-leveling mortar: the material is prepared by mixing 490Kg of portland cement, 110Kg of fly ash, 630Kg of quartz sand, 920Kg of fine stone, 74Kg of expanding agent, 12Kg of self-leveling water retention agent and 170Kg of water.
Example 2
Preparing a self-leveling water-retaining agent: 3.57Kg of allyl hydroxyethyl ether monomer, 1.32Kg of 1, 4-butylene glycol monomer, 6.61Kg of diethylene glycol monovinyl ether monomer, 1Kg of formaldehyde and 20Kg of methanol are added into a reaction kettle, 0.1Kg of ammonium persulfate is added as an initiator, the mixture reacts for 5.5 hours under the conditions of pressure of 0.5MPa and temperature of 105 ℃, and the copolymer of the formula I with the average molecular weight of 250 ten thousand is obtained after purification and drying.
Preparing an expanding agent: 2.64Kg of 2, 3, 4, 5, 6-pentahydroxy-2-hexenoic acid-4-lactone monomer, 4.41Kg of 1, 4-butenediol monomer, 3.48Kg of 3, 4, 5-trihydroxy-1-cyclohexene-1-carboxylic acid monomer, 1Kg of formaldehyde and 20Kg of methanol are added into a reaction kettle, 0.1Kg of ammonium persulfate is added as an initiator, the mixture is reacted for 3.5 hours under the conditions of pressure of 0.5MPa and temperature of 110 ℃, and the mixture is purified and dried to obtain the copolymer of the formula II with the average molecular weight of 60 ten thousand. The expanding agent is obtained by uniformly mixing raw materials comprising 32.5Kg of gypsum, 42.5Kg of metakaolin, 105Kg of dihydrate gypsum powder, 6Kg of fluorite powder and 1Kg of copolymer of formula II.
Preparing a fine stone micro-expansion self-leveling material: the material is prepared by mixing 495Kg of portland cement, 105Kg of fly ash, 635Kg of quartz sand, 925Kg of fine stone, 73Kg of expanding agent and 12.5Kg of self-leveling water-retaining agent.
Preparing fine stone micro-expansion self-leveling mortar: the material is prepared by mixing 495Kg of Portland cement, 105Kg of fly ash, 635Kg of quartz sand, 925Kg of fine stone, 73Kg of expanding agent, 12.5Kg of self-leveling water retention agent and 172.5Kg of water.
Example 3
Preparing a self-leveling water-retaining agent: 4.09Kg of allyl hydroxyethyl ether monomer, 1.76Kg of 1, 4-butylene glycol monomer, 9.91Kg of diethylene glycol monovinyl ether monomer, 1Kg of formaldehyde and 20Kg of methanol are added into a reaction kettle, 0.1Kg of ammonium persulfate is added as an initiator, the mixture reacts for 6 hours under the conditions of pressure of 0.5MPa and temperature of 105 ℃, and the mixture is purified and dried to obtain the copolymer of formula I with the average molecular weight of 300 ten thousand.
Preparing an expanding agent: adding 3.52Kg of 2, 3, 4, 5, 6-pentahydroxy-2-hexenoic acid-4-lactone monomer, 6.61Kg of 1, 4-butylene glycol monomer, 2.61Kg of 3, 4, 5-trihydroxy-1-cyclohexene-1-formic acid monomer, 1Kg of formaldehyde and 20Kg of methanol into a reaction kettle, adding 0.1Kg of ammonium persulfate as an initiator, reacting for 4 hours under the conditions of 0.5MPa of pressure and 110 ℃, purifying and drying to obtain the copolymer of formula II with the average molecular weight of 100 ten thousand. The expanding agent is prepared by uniformly mixing raw materials comprising 35Kg of gypsum, 40Kg of metakaolin, 102.5Kg of dihydrate gypsum powder, 5Kg of fluorite powder and 5.5Kg of copolymer of formula II.
Preparing a fine stone micro-expansion self-leveling material: the material is prepared by mixing raw materials comprising 500Kg of Portland cement, 100Kg of fly ash, 640Kg of quartz sand, 915Kg of fine stone, 73.5Kg of expanding agent and 13Kg of self-leveling water-retaining agent.
Preparing fine stone micro-expansion self-leveling mortar: the material is prepared by mixing raw materials comprising 500Kg of Portland cement, 100Kg of fly ash, 640Kg of quartz sand, 915Kg of fine stone, 73.5Kg of expanding agent, 13Kg of self-leveling water-retaining agent and 175Kg of water.
Example 4
Preparing a self-leveling water-retaining agent: the same as in example 1.
Preparing a fine stone micro-expansion self-leveling material: the same procedure as in example 1 was repeated except that the expansive agent was replaced with a calcium sulfoaluminate concrete expansive agent available from Douta construction materials Co.
Preparing fine stone micro-expansion self-leveling mortar: the same procedure as in example 1 was repeated except that the expansive agent was replaced with a calcium sulfoaluminate concrete expansive agent available from Douta construction materials Co.
Comparative example 1
Preparing a self-leveling water-retaining agent: 0.88Kg of 1, 4-butylene glycol monomer, 13.21Kg of diethylene glycol monovinyl ether monomer, 1Kg of formaldehyde and 20Kg of methanol are added into a reaction kettle, 0.1Kg of ammonium persulfate is added as an initiator, the mixture reacts for 5 hours under the conditions of pressure of 0.5MPa and temperature of 105 ℃, and the mixture is purified and dried to obtain the leveling water-retaining agent.
Preparing an expanding agent: the same as in example 1.
Preparing a fine stone micro-expansion self-leveling material: the same as in example 1.
Preparing fine stone micro-expansion self-leveling mortar: the same as in example 1.
Comparative example 2
Preparing a self-leveling water-retaining agent: 3.06Kg of allyl hydroxyethyl ether monomer, 13.21Kg of diethylene glycol monovinyl ether monomer, 1Kg of formaldehyde and 20Kg of methanol are added into a reaction kettle, 0.1Kg of ammonium persulfate is added as an initiator, the mixture reacts for 5 hours under the conditions of pressure of 0.5MPa and temperature of 105 ℃, and the mixture is purified and dried and is obtained from a leveling water-retaining agent.
Preparing an expanding agent: the same as in example 1.
Preparing a fine stone micro-expansion self-leveling material: the same as in example 1.
Preparing fine stone micro-expansion self-leveling mortar: the same as in example 1.
Comparative example 3
Preparing a self-leveling water-retaining agent: 3.06Kg of allyl hydroxyethyl ether monomer, 0.88Kg of 1, 4-butylene glycol monomer, 1Kg of formaldehyde and 20Kg of methanol are added into a reaction kettle, 0.1Kg of ammonium persulfate is added as an initiator, and the mixture is reacted for 5 hours under the conditions of pressure of 0.5MPa and temperature of 105 ℃, purified and dried, and is obtained from a leveling water-retaining agent.
Preparing an expanding agent: the same as in example 1.
Preparing a fine stone micro-expansion self-leveling material: the same as in example 1.
Preparing fine stone micro-expansion self-leveling mortar: the same as in example 1.
Comparative example 4
Preparing an expanding agent: the same as in example 1.
Preparing a fine stone micro-expansion self-leveling material: compared with the example 1, the self-leveling water retention agent is not added.
Preparing fine stone micro-expansion self-leveling mortar: compared with the example 1, the self-leveling water retention agent is not added.
For the fine stone micro-expansive self-leveling mortar prepared in examples 1 to 4 and comparative examples 1 to 4, the fluidity retention property, the bending and compression strength, the tensile bond strength and the wear resistance were measured according to JC/T985-2005 Standard "Cement-based self-leveling mortar for ground", and the shrinkage was measured according to JC/T1004-2005 Standard "ceramic wall and floor tile Joint mixture", and the measurement results are shown in Table 1.
TABLE 1
From table 1, it can be seen that the self-leveling water-retaining agent prepared by the invention can enhance the early strength and reduce the shrinkage rate of the fine stone micro-expansion self-leveling mortar provided by the invention, and the allyl hydroxyethyl ether monomer, the 1, 4-butylene glycol monomer and the diethylene glycol monovinyl ether monomer play a synergistic role in improving the performance of the self-leveling water-retaining agent. Compared with the expanding agent in the prior art, the expanding agent prepared by the invention can further enhance the early strength of the fine stone micro-expansion self-leveling mortar provided by the invention and reduce the shrinkage rate of the fine stone micro-expansion self-leveling mortar provided by the invention.
Claims (10)
1. The fine stone micro-expansion self-leveling material is characterized in that: the material is prepared by mixing the raw materials of 500 parts by weight of Portland cement 490-containing material, 110 parts by weight of fly ash 100-containing material, 640 parts by weight of quartz sand 630-containing material, 925 parts by weight of fine stone 915-containing material, 73-74 parts by weight of expanding agent and 12-13 parts by weight of self-leveling water-retaining agent; the self-leveling water retention agent comprises a polymer shown as a formula I, wherein the polymer shown as the formula I has a structural general formula
Wherein a, b and c are 3-4:1-2:5-10, and the average molecular weight of the polymer in the formula I is 200-300 ten thousand.
2. The fine stone micro-expanded self-leveling material according to claim 1, wherein: the expanding agent is prepared by mixing 30-35 parts of gypsum, 40-45 parts of metakaolin, 100-105 parts of dihydrate gypsum powder, 4-6 parts of fluorite powder and 1-10 parts of a copolymer of a formula II in parts by weight, wherein the copolymer of the formula II has a structural general formula
Wherein d, e and f are the number of the chain links of the copolymer repeating unit of the formula II, d, e and f are 1-2:5-10:1-2, and the average molecular weight of the copolymer of the formula II is 20-100 ten thousand.
3. The fine stone micro-expanded self-leveling material according to claim 1, wherein: the portland cement is P.O42.5 portland cement.
4. The fine stone micro-expanded self-leveling material according to claim 1, wherein: the quartz sand consists of 40-80 meshes of quartz sand and 80-120 meshes of quartz sand, and the weight ratio of the 40-80 meshes of quartz sand to the 80-120 meshes of quartz sand is 1: 1-1.4.
5. The fine stone micro-expanded self-leveling material according to claim 1, wherein: the average particle size of the fine stone is 5-12 mm.
6. The fine stone micro-expanded self-leveling material according to claim 1, wherein: the fly ash is F-class II-grade fly ash.
7. The fine stone micro-expansion self-leveling mortar is characterized in that: is prepared by mixing raw materials comprising 175 parts by weight of 170-containing water, 500 parts by weight of 490-containing portland cement, 110 parts by weight of fly ash, 640 parts by weight of quartz sand, 925 parts by weight of fine stone 915-containing sand, 73-74 parts by weight of expanding agent and 12-13 parts by weight of self-leveling water-retaining agent; the self-leveling water retention agent comprises a polymer shown as a formula I, wherein the polymer shown as the formula I has a structural general formula
Wherein a, b and c are 3-4:1-2:5-10, and the average molecular weight of the polymer in the formula I is 200-300 ten thousand.
8. The fine stone micro-expansive self-leveling mortar according to claim 7, wherein: the expanding agent is prepared by mixing 30-35 parts of gypsum, 40-45 parts of metakaolin, 100-105 parts of dihydrate gypsum powder, 4-6 parts of fluorite powder and 1-10 parts of a copolymer of a formula II in parts by weight, wherein the copolymer of the formula II has a structural general formula
Wherein d, e and f are the number of the chain links of the copolymer repeating unit of the formula II, d, e and f are 1-2:5-10:1-2, and the average molecular weight of the copolymer of the formula II is 20-100 ten thousand.
9. The fine stone micro-expansive self-leveling mortar according to claim 7, wherein: the quartz sand consists of 40-80 meshes of quartz sand and 80-120 meshes of quartz sand, and the weight ratio of the 40-80 meshes of quartz sand to the 80-120 meshes of quartz sand is 1: 1-1.4; the particle size of the fine stone is 5-12 mm.
10. The fine stone micro-expansive self-leveling mortar according to claim 7, wherein: the portland cement is P.O42.5 portland cement; the fly ash is F-class II-grade fly ash.
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| CN104108918A (en) * | 2014-06-19 | 2014-10-22 | 广东省建筑科学研究院 | High performance cement-base self-leveling mortar |
| EP2526072B1 (en) * | 2010-01-21 | 2016-03-30 | BASF Construction Polymers GmbH | Dispersing agent |
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| CN101244915A (en) * | 2008-03-25 | 2008-08-20 | 武汉理工大学 | Ultra-plasticizing gravity flow flat crack resistant mortar |
| CN102076631A (en) * | 2008-06-27 | 2011-05-25 | 阿克佐诺贝尔股份有限公司 | Redispersible polymer powder |
| CN101538136A (en) * | 2009-04-29 | 2009-09-23 | 华南理工大学 | Premixing mortar with high moisture retention and production method thereof |
| EP2526072B1 (en) * | 2010-01-21 | 2016-03-30 | BASF Construction Polymers GmbH | Dispersing agent |
| CN103059231A (en) * | 2013-01-16 | 2013-04-24 | 山西大学 | Comb type high-molecular sand fixation and water retaining agent and preparation method of same |
| CN104108918A (en) * | 2014-06-19 | 2014-10-22 | 广东省建筑科学研究院 | High performance cement-base self-leveling mortar |
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| CN108455924A (en) | 2018-08-28 |
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