CN111635162A - Green and environment-friendly mortar regulator and preparation method thereof - Google Patents
Green and environment-friendly mortar regulator and preparation method thereof Download PDFInfo
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- CN111635162A CN111635162A CN202010525825.0A CN202010525825A CN111635162A CN 111635162 A CN111635162 A CN 111635162A CN 202010525825 A CN202010525825 A CN 202010525825A CN 111635162 A CN111635162 A CN 111635162A
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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
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/2652—Nitrogen containing polymers, e.g. polyacrylamides, polyacrylonitriles
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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
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/34—Esters containing nitrogen, e.g. N,N-dimethylaminoethyl (meth)acrylate
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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
- C04B2103/10—Accelerators; Activators
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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
- C04B2103/40—Surface-active agents, dispersants
- C04B2103/408—Dispersants
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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
- C04B2103/44—Thickening, gelling or viscosity increasing agents
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Abstract
The invention discloses a green environment-friendly mortar regulator, which relates to the technical field of concrete admixtures and comprises the following components: cationic monomer: 17% -26%; anionic carboxyl monomer: 3% -8%; organic alcohol amine: 10% -15%; coupling agent: 0.8% -1.3%; initiator: 0.3% -0.9%; stearic acid: 0.5 to 1.8 percent; sorbitol: 1% -1.8%; water: the balance; the preparation method comprises the following steps: s1, mixing a cationic monomer, an anionic carboxyl monomer and 20% of water, and adding an initiator to obtain an intermediate product; s2, sequentially adding the coupling agent, stearic acid and sorbitol into the intermediate product to obtain a semi-finished product; and S3, adding the residual 80 percent of water into the semi-finished product for dilution. The regulator obtained by the invention has the advantage of improving the workability of concrete on the premise of ensuring the strength of the concrete.
Description
Technical Field
The invention relates to the technical field of concrete admixtures, in particular to a green environment-friendly mortar regulator and a preparation method thereof.
Background
In the field of construction, cement is generally used as a cementing material, sand is used as aggregate, and is mixed with water according to a certain proportion to prepare mortar concrete, and different additives are required to be added in the preparation process of the concrete so as to improve the performance of the concrete. After cement material particles are mixed with water, the cement particles are mutually attracted under the action of electrostatic attraction and the like to form a three-dimensional flocculation structure, 10-30% of mixing water is wrapped in the flocculation structure and cannot flow freely, the fluidity of a mixture is poor, and the water demand is improved.
At present, the water reducing agent is generally adopted to disperse and disintegrate cement particles, so that the unit water consumption is reduced, and because enterprises have higher requirements on the early strength of cement, the content of fine powder in the cement particles on the market is higher, and the fine powder can fill gaps among large particles, so that the strength of concrete is improved. In the concrete preparation process, only the water reducing agent is added, the water reducing agent and fine powder particles can be mutually adsorbed, the flocculation structure of the ultrafine particles cannot be effectively dispersed, and the whole concrete has poor workability due to too fast or too slow hydration process.
Disclosure of Invention
The first purpose of the invention is to provide a green and environment-friendly mortar regulator, which has the advantage of improving the workability of concrete under the condition of ensuring the strength of the concrete.
The second purpose of the invention is to provide a preparation method of the green environment-friendly mortar regulator, which can prepare the regulator for improving the workability of concrete.
In order to achieve the first object, the invention provides the following technical scheme:
the green environment-friendly mortar regulator is mainly prepared from the following raw materials in percentage by mass:
cationic monomer: 17% -26%;
anionic carboxyl monomer: 3% -8%;
organic alcohol amine: 10% -15%;
coupling agent: 0.8% -1.3%;
initiator: 0.3% -0.9%;
stearic acid: 0.5 to 1.8 percent;
sorbitol: 1% -1.8%;
water: the balance;
wherein the cationic monomer is one or more of acryloyloxyethyl trimethyl ammonium chloride, methacryloyloxyethyl trimethyl ammonium chloride and methacryloyloxyethyl dimethyl benzyl ammonium chloride.
By adopting the technical scheme, the cationic monomer and the anionic carboxyl monomer are freely copolymerized to form the high molecular polymer, the polymer has a good dispersing effect on cement particles, meanwhile, the organic alcohol amine activates the hydration reaction of the fly ash and the slag micro powder in the concrete, the fluidity of the concrete is improved, the over-slow hydration degree of the concrete is avoided, the early strength of the concrete is maintained by the sorbitol, the fluidity of the concrete is improved on the premise of ensuring the strength of the concrete, and therefore the workability is improved.
Further, the regulator is prepared from the following raw materials in percentage by mass: 0.1 to 0.3 percent of sodium bisulfite.
By adopting the technical scheme, the early strength of the concrete can be improved by the sodium bisulfite, and the water cement ratio of the concrete is properly reduced in the preparation process of the mortar, so that the early strength of the concrete is ensured while the fluidity of the concrete is improved.
Further, the organic alcohol amine is formed by mixing diisopropanolamine, 2-N-dibutylethanol and monoethanol diisopropanolamine according to the mass ratio of 3:1: 5.
By adopting the technical scheme, the organic alcohol amine has better performance through compounding the diisopropanolamine, the 2-N-dibutylethanol and the monoethanol diisopropanolamine according to a proportion, so that the excitation performance of the organic alcohol amine is improved, the dispersion of cement particles is further promoted, and the workability of concrete is improved.
Further, the anionic carboxyl monomer is formed by mixing one or more of acrylic acid, maleic anhydride and methacrylic acid.
By adopting the technical scheme, the cationic monomer and the anionic carboxyl monomer are freely copolymerized to form the high molecular polymer, and the coupling agent can promote the dispersion effect of the polymer on cement particles, so that the fluidity of concrete is improved, and the workability of the concrete is improved.
Further, the mass ratio of the organic alcohol amine to the stearic acid is 1: 13.
by adopting the technical scheme, stearic acid carries a hydrophilic group and a lipophilic group, part of organic alcohol amine can be combined with stearic acid to generate acylalkanolamine, and the acylalkanolamine has thickening and dispersing effects on concrete, so that the fluidity of the concrete is improved.
Further, the initiator is formed by mixing cycloethanone peroxide and N, N-dimethylaniline according to the mass ratio of 1 (1-2).
By adopting the technical scheme, the initiator can promote the low molecules containing double bonds in the cationic monomer and the anionic carboxyl monomer to be activated into free radicals, so that the free radical copolymerization reaction is carried out to form a high molecular copolymer, and the high molecular polymer can improve the dispersibility and the fluidity of concrete.
Further, the coupling agent is prepared by mixing methyl triethoxysilane, vinyl trimethoxysilane and propyl trimethoxysilane according to the mass ratio of 2:3: 2.
By adopting the technical scheme, the coupling agent is prepared from methyl triethoxysilane, vinyl trimethoxysilane and propyl trimethoxysilane according to the proportion, so that the dispersing effect of the high-molecular polymer on cement particles can be effectively promoted, the performance of concrete mortar is improved, and the workability is improved.
Further, the regulator is mainly prepared from the following raw materials in percentage by mass:
methacryloyloxyethyl trimethyl ammonium chloride: 20 percent;
acrylic acid: 5 percent;
organic alcohol amine: 11.7 percent;
coupling agent: 1.3 percent;
initiator: 0.7 percent;
stearic acid: 0.9 percent;
sorbitol: 1.8 percent;
sodium bisulfite: 0.1 percent;
water: the balance;
the organic alcohol amine is formed by mixing diisopropanolamine, 2-N-dibutylethanol and monoethanol diisopropanolamine according to the mass ratio of 3:1:5, the coupling agent is formed by mixing methyltriethoxysilane, vinyl trimethoxy silane and propyl trimethoxy silane according to the mass ratio of 2:3:2, and the initiator is formed by mixing cycloethanone peroxide and N, N-dimethylaniline according to the mass ratio of 1: 1.
By adopting the technical scheme, the components and the content ratio in the regulator are controlled within the specific range, so that the overall performance of the regulator is improved, and when the regulator is applied to concrete, the fluidity of mortar can be improved and the workability is improved on the premise of ensuring that the concrete has better strength.
In order to achieve the second object, the invention provides the following technical scheme:
a preparation method of a green environment-friendly mortar regulator comprises the following steps:
s1, mixing the cationic monomer, the anionic carboxyl monomer and 20% of water, uniformly stirring, adding an initiator, heating to 35-45 ℃, and keeping the temperature for 3-4 hours to obtain an intermediate product;
s2, sequentially adding the coupling agent, stearic acid and sorbitol into the intermediate product, stirring and mixing uniformly, controlling the system temperature to be 55-65 ℃, and preserving heat for 1-2 hours to obtain a semi-finished product;
and S3, adding the residual 80% of water into the semi-finished product for dilution to obtain the regulator.
By adopting the technical scheme, the cationic monomer and the anionic carboxyl monomer are subjected to free radical copolymerization at a lower temperature in advance to obtain a high molecular polymer, and then the high molecular polymer is mixed with the coupling agent, stearic acid and sorbitol at a higher temperature to obtain the regulator.
Further, in step S2, sodium hydrogen sulfite is added.
In conclusion, the invention has the following beneficial effects:
the method comprises the steps of firstly, freely copolymerizing a cationic monomer and an anionic carboxyl monomer to form a high-molecular polymer, wherein the polymer has a good dispersing effect on cement particles, activating a hydration reaction of fly ash and slag micro powder in concrete by organic alcohol amine, improving the fluidity of the concrete, avoiding the over-slow hydration degree of the concrete, maintaining the early strength of the concrete by sorbitol, and improving the fluidity of the concrete on the premise of ensuring the strength of the concrete, thereby improving the workability.
And secondly, the early strength of the concrete can be improved by the sodium bisulfite, and the water cement ratio of the concrete is properly reduced in the preparation process of the mortar, so that the early strength of the concrete is ensured while the fluidity of the concrete is improved.
Thirdly, stearic acid carries a hydrophilic group and a lipophilic group, and part of organic alcohol amine can be combined with stearic acid to generate acylalkanolamine, so that the thickening and dispersing effects on concrete are improved, and the fluidity of the concrete is improved.
Detailed Description
The present invention will be described in further detail with reference to examples.
The source of the raw materials used in the following examples are shown in table 1 below:
TABLE 1 sources of raw materials in the examples
| Raw materials | Model number | Manufacturer of the product |
| Acryloxyethyltrimethyl ammonium chloride | Goods number 001 | Jinan Walde chemical Co., Ltd |
| Methacryloyloxyethyl trimethyl ammonium chloride | CAS5039-78-1 | Jinan Noshi New Material Co Ltd |
| Methacryloyloxyethyl dimethylbenzyl ammonium chloride | CAS46917-07-1 | Kunshancheng bioscience and technology Limited |
| Diisopropanolamine | CAS110-97-4 | Bailingwei Tech Co Ltd |
| 2-N-dibutylaminoethanol | CAS102-81-8 | Qingdao Ruinasi Polymer materials Co Ltd |
| Ethanol diisopropanolamine | CAS6712-98-7 | NINGBO LIANKAI CHEMICAL Co.,Ltd. |
| Acrylic acid | CAS79-10-7 | Kunming Kunhui David Co Ltd |
| Maleic anhydride | CAS108-31-6 | JIANGSU CHANGSANJIAO FINE CHEMICAL Co.,Ltd. |
| Methacrylic acid | CAS79-41-4 | Ningbo Huajia chemical Co Ltd |
| Methyltriethoxysilane | CAS2031-67-6 | Jinan Haobang chemical Co., Ltd |
| Vinyl trimethoxy silane | KH-171 | Hangzhou Jessica chemical Co Ltd |
| Propyl trimethoxy silane | CAS1067-25-0 | Hundredth chemical company, Hubei Ltd |
| Stearic acid | 1838 | Shijiazhuang Jialuoka chemical Co Ltd |
| Sorbitol | CAS50-70-4 | Shenzhen Lefu Biotech Co Ltd |
Examples
Example 1
A green environment-friendly mortar regulator is mainly prepared from the following raw materials in percentage by mass:
acryloyloxyethyltrimethyl ammonium chloride: 17 percent;
maleic anhydride: 8 percent;
organic alcohol amine: 10 percent;
coupling agent: 0.8 percent;
initiator: 0.3 percent;
stearic acid: 0.8 percent;
sorbitol: 1 percent;
water: the balance;
wherein the organic alcohol amine is diisopropanolamine, the coupling agent is methyltriethoxysilane, and the initiator is prepared by mixing cycloethanone peroxide and N, N-dimethylaniline according to the mass ratio of 1: 2.
The green environment-friendly mortar regulator of the embodiment is prepared by the following method:
s1, mixing acryloyloxyethyl trimethyl ammonium chloride, maleic anhydride and 20% of water, uniformly stirring, adding an initiator, heating to 35 ℃, and preserving heat for 3 hours to obtain an intermediate product;
s2, sequentially adding methyl triethoxysilane, stearic acid and sorbitol into the intermediate product, stirring and mixing uniformly, controlling the system temperature to be 55 ℃, and preserving heat for 1h to obtain a semi-finished product;
and S3, adding the residual 80% of water into the semi-finished product for dilution to obtain the regulator.
Example 2
A green environment-friendly mortar regulator is mainly prepared from the following raw materials in percentage by mass:
methacryloyloxyethyl dimethylbenzyl ammonium chloride: 25 percent;
methacrylic acid: 3 percent;
organic alcohol amine: 15 percent;
coupling agent: 0.9 percent;
initiator: 0.5 percent;
stearic acid: 0.5 percent;
sorbitol: 1.5 percent;
water: the balance;
wherein the organic alcohol amine is diisopropanolamine, the coupling agent is methyltriethoxysilane, and the initiator is prepared by mixing cycloethanone peroxide and N, N-dimethylaniline according to the mass ratio of 1: 1.
The green environment-friendly mortar regulator of the embodiment is prepared by the following method:
s1, mixing methacryloyloxyethyl dimethylbenzyl ammonium chloride, methacrylic acid and 20% of water, uniformly stirring, adding an initiator, heating to 40 ℃, and keeping the temperature for 4 hours to obtain an intermediate product;
s2, sequentially adding methyl triethoxysilane, stearic acid and sorbitol into the intermediate product, stirring and mixing uniformly, controlling the system temperature at 60 ℃, and preserving heat for 1h to obtain a semi-finished product;
and S3, adding the residual 80% of water into the semi-finished product for dilution to obtain the regulator.
Example 3
A green environment-friendly mortar regulator is mainly prepared from the following raw materials in percentage by mass:
methacryloyloxyethyl trimethyl ammonium chloride: 20 percent;
acrylic acid: 5 percent;
organic alcohol amine: 14 percent;
coupling agent: 1.3 percent;
initiator: 0.7 percent;
stearic acid: 1.4 percent;
sorbitol: 1.8 percent;
water: the balance;
wherein the organic alcohol amine is diisopropanolamine, the coupling agent is methyltriethoxysilane, and the initiator is prepared by mixing cycloethanone peroxide and N, N-dimethylaniline according to the mass ratio of 1: 1.
The green environment-friendly mortar regulator of the embodiment is prepared by the following method:
s1, mixing methacryloyloxyethyl trimethyl ammonium chloride, acrylic acid and 20% of water, uniformly stirring, adding an initiator, heating to 35 ℃, and preserving heat for 3 hours to obtain an intermediate product;
s2, sequentially adding methyl triethoxysilane, stearic acid and sorbitol into the intermediate product, stirring and mixing uniformly, controlling the system temperature to be 55 ℃, and preserving heat for 2 hours to obtain a semi-finished product;
and S3, adding the residual 80% of water into the semi-finished product for dilution to obtain the regulator.
Example 4
A green environment-friendly mortar regulator is mainly prepared from the following raw materials in percentage by mass:
methacryloyloxyethyl dimethylbenzyl ammonium chloride: 26 percent;
acrylic acid: 6 percent;
organic alcohol amine: 12 percent;
coupling agent: 1.1 percent;
initiator: 0.9 percent;
stearic acid: 1.8 percent;
sorbitol: 1.4 percent;
water: the balance;
wherein the organic alcohol amine is diisopropanolamine, the coupling agent is methyltriethoxysilane, and the initiator is prepared by mixing cycloethanone peroxide and N, N-dimethylaniline according to the mass ratio of 1: 2.
The green environment-friendly mortar regulator of the embodiment is prepared by the following method:
s1, mixing methacryloyloxyethyl dimethylbenzyl ammonium chloride, acrylic acid and 20% of water, uniformly stirring, adding an initiator, heating to 45 ℃, and preserving heat for 3 hours to obtain an intermediate product;
s2, sequentially adding methyl triethoxysilane, stearic acid and sorbitol into the intermediate product, stirring and mixing uniformly, controlling the system temperature to 65 ℃, and preserving heat for 1h to obtain a semi-finished product;
and S3, adding the residual 80% of water into the semi-finished product for dilution to obtain the regulator.
Example 5
A green environment-friendly mortar regulator is mainly prepared from the following raw materials in percentage by mass:
methacryloyloxyethyl trimethyl ammonium chloride: 17 percent;
methacrylic acid: 7 percent;
organic alcohol amine: 10 percent;
coupling agent: 0.9 percent;
initiator: 0.6 percent;
stearic acid: 1 percent;
sorbitol: 1.7 percent;
water: the balance;
wherein the organic alcohol amine is diisopropanolamine, the coupling agent is methyltriethoxysilane, and the initiator is prepared by mixing cycloethanone peroxide and N, N-dimethylaniline according to the mass ratio of 1: 1.
The green environment-friendly mortar regulator of the embodiment is prepared by the following method:
s1, mixing methacryloyloxyethyl trimethyl ammonium chloride, methacrylic acid and 20% of water, uniformly stirring, adding an initiator, heating to 40 ℃, and keeping the temperature for 4 hours to obtain an intermediate product;
s2, sequentially adding methyl triethoxysilane, stearic acid and sorbitol into the intermediate product, stirring and mixing uniformly, controlling the system temperature to be 55 ℃, and preserving heat for 2 hours to obtain a semi-finished product;
and S3, adding the residual 80% of water into the semi-finished product for dilution to obtain the regulator.
Example 6
The green environment-friendly mortar regulator is different from the mortar regulator in embodiment 3 in that the raw material components of the regulator also comprise 0.1% by mass of sodium bisulfite.
Example 7
The green environment-friendly mortar regulator is different from the mortar regulator in embodiment 3 in that the raw material components of the regulator also comprise 0.2% of sodium bisulfite in percentage by mass.
Example 8
The green environment-friendly mortar regulator is different from the mortar regulator in embodiment 3 in that the raw material components of the regulator also comprise 0.3% of sodium bisulfite in percentage by mass.
Example 9
The difference between the green environment-friendly mortar regulator and the mortar regulator in the embodiment 3 is that the organic alcohol amine is 2-N-dibutylaminoethanol.
Example 10
The difference between the green environment-friendly mortar regulator and the mortar regulator in the embodiment 3 is that the organic alcohol amine is ethanol diisopropanolamine.
Example 11
The green environment-friendly mortar regulator is different from the mortar regulator in the embodiment 3 in that the organic alcohol amine is formed by mixing diisopropanolamine, 2-N-dibutylethanol and monoethanol diisopropanolamine according to the mass ratio of 2:3: 1.
Example 12
The green environment-friendly mortar regulator is different from the mortar regulator in the embodiment 3 in that the organic alcohol amine is formed by mixing diisopropanolamine, 2-N-dibutylethanol and monoethanol diisopropanolamine according to the mass ratio of 1:3: 1.
Example 13
The green environment-friendly mortar regulator is different from the mortar regulator in the embodiment 3 in that the organic alcohol amine is formed by mixing diisopropanolamine, 2-N-dibutylethanol and monoethanol diisopropanolamine according to the mass ratio of 3:1: 5.
Example 14
The green environment-friendly mortar regulator is different from the mortar regulator in the embodiment 3 in that the organic alcohol amine is formed by mixing diisopropanolamine, 2-N-dibutylethanol and monoethanol diisopropanolamine according to the mass ratio of 2:5: 3.
Example 15
The green environment-friendly mortar regulator is different from the mortar regulator in example 3 in that the coupling agent is vinyl trimethoxy silane.
Example 16
The difference between the green environment-friendly mortar regulator and the mortar regulator in the embodiment 3 is that the coupling agent is propyl trimethoxy silane.
Example 17
The green environment-friendly mortar regulator is different from the mortar regulator in the embodiment 3 in that the coupling agent is prepared by mixing methyl triethoxysilane, vinyl trimethoxysilane and propyl trimethoxysilane according to the mass ratio of 2:3: 2.
Example 18
The green environment-friendly mortar regulator is different from the mortar regulator in the embodiment 3 in that the coupling agent is prepared by mixing methyl triethoxysilane, vinyl trimethoxysilane and propyl trimethoxysilane according to the mass ratio of 1:1: 2.
Example 19
The green environment-friendly mortar regulator is different from the mortar regulator in the embodiment 3 in that the coupling agent is prepared by mixing methyl triethoxysilane, vinyl trimethoxysilane and propyl trimethoxysilane according to the mass ratio of 3:1: 3.
Example 20
The green environment-friendly mortar regulator is different from the mortar regulator in the embodiment 3 in that the coupling agent is prepared by mixing methyl triethoxysilane, vinyl trimethoxysilane and propyl trimethoxysilane according to the mass ratio of 1:3: 3.
Example 21
The green environment-friendly mortar regulator is different from the mortar regulator in example 3 in that the mass percent of the organic alcohol amine is 12%, the mass percent of the stearic acid is 1.2%, and the mass ratio of the organic alcohol amine to the stearic acid is 1: 10.
example 22
The green environment-friendly mortar regulator is different from the mortar regulator in example 3 in that the mass percent of organic alcohol amine is 15%, the mass percent of stearic acid is 1.5%, and the mass ratio of the organic alcohol amine to the stearic acid is 1: 10.
example 23
The green environment-friendly mortar regulator is different from the mortar regulator in example 3 in that the mass percent of organic alcohol amine is 13%, the mass percent of stearic acid is 1%, and the mass ratio of the organic alcohol amine to the stearic acid is 1: 13.
example 24
The green environment-friendly mortar regulator is different from the mortar regulator in example 3 in that the mass percent of organic alcohol amine is 11.7%, the mass percent of stearic acid is 0.9%, and the mass ratio of the organic alcohol amine to the stearic acid is 1: 13.
example 25
The green environment-friendly mortar regulator is different from the mortar regulator in example 3 in that the mass percent of organic alcohol amine is 14.4%, the mass percent of stearic acid is 0.8%, and the mass ratio of the organic alcohol amine to the stearic acid is 1: 18.
example 26
The green environment-friendly mortar regulator is different from the mortar regulator in example 3 in that the mass percent of organic alcohol amine is 10.8%, the mass percent of stearic acid is 0.6%, and the mass ratio of the organic alcohol amine to the stearic acid is 1: 18.
comparative example
Comparative example 1
The difference between the green environment-friendly mortar regulator and the embodiment 3 is that the regulator is not added with organic alcohol amine.
Comparative example 2
The green environment-friendly mortar regulator is different from the mortar regulator in example 3 in that stearic acid is not added in the mortar regulator.
Comparative example 3
The green environment-friendly mortar regulator is different from the mortar regulator in example 3 in that sorbitol is not added in the mortar regulator.
Comparative example 4
The green environment-friendly mortar regulator is different from the mortar regulator in example 3 in that no coupling agent is added in the mortar regulator.
Performance test
The test takes C50 concrete mortar as an object, the cement adopts ordinary portland cement, the sand material adopts river sand with fineness modulus of 2.6, the stones are continuous graded broken stones with the thickness of 5-25mm, and the mixing amount of the regulator is 0.6%. The conditioning agents prepared in the above examples and comparative examples were applied to a C40 concrete mortar.
TABLE 2C 40 concrete mortar compositions
| Cement | Fly ash | Sand | Stone (stone) | Water (W) |
| 230kg/m3 | 65kg/m3 | 820kg/m3 | 950kg/m3 | 200kg/m3 |
Testing according to a 3.1 slump and slump expansion method in GB/T50080-2002 standard of common concrete mixture performance test methods, and detecting initial slump (mm)/slump (mm) and 1h slump (mm)/slump (mm) of mortar;
manufacturing a standard block according to GB/T50081-2016 standard of mechanical property test method of common concrete, and testing the compressive strength (mpa) of standard brick block curing 28d of a plurality of examples and a plurality of comparative examples;
the bleeding rate (%) of the mortar is detected according to the determination of the bleeding rate ratio of 6.5.3 in GB/T8076-2008 concrete admixture.
TABLE 3 test results of examples and comparative examples
Compared with the test results of the example 3 and the comparative example 1 in the table 3, the organic alcohol amine added into the regulator can improve the slump of concrete and reduce the bleeding rate, atomic groups of the organic alcohol amine can be adsorbed and reconstructed with cement particles, so that the electrostatic repulsion of cement particle parts is increased, the dispersibility of the cement particles is improved, the rapid hydration of the fly ash and the slag micropowder in the cement is promoted, the too slow hydration degree of the concrete is avoided, the fluidity of the concrete is improved, and the workability is obviously improved.
It can be seen from the comparison of the test results of example 3 and comparative example 2 in table 3 that stearic acid added into the regulator can significantly reduce the bleeding rate of concrete and simultaneously improve slump, and stearic acid carries hydrophilic groups and lipophilic groups, which are easily combined with surfactants in cement, such as organoalcamines, etc., to promote the formation of micelles, so that two molecules are tightly arranged on the surface in a directional manner, thereby improving the fluidity of concrete and avoiding the sagging and bleeding caused by the too fast early hydration process of concrete.
From the comparison of the test results of examples 3 and 21 to 26 in table 3, it is understood that when the mass ratio of the organic alcohol amine to the stearic acid is 1:13, the bleeding rate of the concrete is decreased and the slump is increased, and a part of the organic alcohol amine can be combined with the stearic acid to form an acylalkanolamine, which has thickening and dispersing effects and improves the fluidity of the concrete.
As shown by comparing the test results of examples 3 and 6-8 in Table 3, the sodium bisulfite added into the modifier can improve the early compressive strength of the concrete, and the sodium bisulfite can properly reduce the water cement ratio of the concrete in the process of preparing the mortar, thereby obtaining the concrete with high strength and durability.
As shown by comparing the test results of example 3 and comparative example 4 in Table 3, the slump of concrete can be improved by adding the coupling agent and the regulator, and the cationic monomer and the anionic carboxyl monomer can be copolymerized to form a high molecular polymer, so that the polymer has the advantages of improving the dispersibility of cement particles, improving the dispersion effect of the cement particles and improving the workability.
As can be seen from comparison of test results of the example 3 and the comparative example 3 in the table 3, when sorbitol is added into the regulator, the strength of the concrete can be improved, the slump loss after 1 hour is reduced, the sorbitol plays a role in retarding setting, the too fast hydration process is avoided, the concrete keeps plasticity for a long time, and the strength of the concrete is ensured.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (10)
1. The environment-friendly mortar regulator is characterized by being mainly prepared from the following raw materials in percentage by mass:
cationic monomer: 17% -26%;
anionic carboxyl monomer: 3% -8%;
organic alcohol amine: 10% -15%;
coupling agent: 0.8% -1.3%;
initiator: 0.3% -0.9%;
stearic acid: 0.5 to 1.8 percent;
sorbitol: 1% -1.8%;
water: the balance;
wherein the cationic monomer is one or more of acryloyloxyethyl trimethyl ammonium chloride, methacryloyloxyethyl trimethyl ammonium chloride and methacryloyloxyethyl dimethyl benzyl ammonium chloride.
2. The environment-friendly mortar conditioner according to claim 1, characterized in that the conditioner further comprises the following raw materials by mass percent: 0.1 to 0.3 percent of sodium bisulfite.
3. The environment-friendly mortar regulator according to claim 1, wherein the organic alcohol amine is prepared by mixing diisopropanolamine, 2-N-dibutylethanol and monoethanol diisopropanolamine according to a mass ratio of 3:1: 5.
4. The environment-friendly mortar conditioner as claimed in claim 1, wherein the anionic carboxyl monomer is one or more of acrylic acid, maleic anhydride and methacrylic acid.
5. The environment-friendly mortar conditioner as claimed in claim 1, wherein the mass ratio of the organic alcohol amine to the stearic acid is 1: 13.
6. the environment-friendly mortar conditioner as claimed in claim 1, wherein the initiator is prepared by mixing cycloethanone peroxide and N, N-dimethylaniline according to a mass ratio of 1 (1-2).
7. The environment-friendly mortar regulator as claimed in claim 1, wherein the coupling agent is prepared by mixing methyl triethoxysilane, vinyl trimethoxysilane and propyl trimethoxysilane in a mass ratio of 2:3: 2.
8. The environment-friendly mortar regulator according to any one of claims 1 to 7, wherein the regulator is mainly prepared from the following raw materials in percentage by mass:
methacryloyloxyethyl trimethyl ammonium chloride: 20 percent;
acrylic acid: 5 percent;
organic alcohol amine: 11.7 percent;
coupling agent: 1.3 percent;
initiator: 0.7 percent;
stearic acid: 0.9 percent;
sorbitol: 1.8 percent;
sodium bisulfite: 0.1 percent;
water: the balance;
the organic alcohol amine is formed by mixing diisopropanolamine, 2-N-dibutylethanol and monoethanol diisopropanolamine according to the mass ratio of 3:1:5, the coupling agent is formed by mixing methyltriethoxysilane, vinyl trimethoxy silane and propyl trimethoxy silane according to the mass ratio of 2:3:2, and the initiator is formed by mixing cycloethanone peroxide and N, N-dimethylaniline according to the mass ratio of 1: 1.
9. The preparation method of the environment-friendly mortar conditioner as claimed in any one of claims 1 to 8, characterized by comprising the following steps:
s1, mixing the cationic monomer, the anionic carboxyl monomer and 20% of water, uniformly stirring, adding an initiator, heating to 35-45 ℃, and keeping the temperature for 3-4 hours to obtain an intermediate product;
s2, sequentially adding the coupling agent, stearic acid and sorbitol into the intermediate product, stirring and mixing uniformly, controlling the system temperature to be 55-65 ℃, and preserving heat for 1-2 hours to obtain a semi-finished product;
and S3, adding the residual 80% of water into the semi-finished product for dilution to obtain the regulator.
10. The method for preparing environment-friendly mortar conditioner according to claim 9, characterized in that sodium bisulfite is further added in step S2.
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