CN109384881B - Method for preparing gel reducing agent from cationic polymer - Google Patents

Abstract

The invention provides a method for preparing a sizing reducer from a cationic polymer. The cationic polymer-prepared gel reducing agent is prepared from the following components in parts by weight: 10-20 parts of alcohol amine compounds, 1-5 parts of organic polyols, 10-25 parts of cationic polymers, and 0.05-0.1 parts of lubricant The above components are put into the reaction kettle and fully stirred for 0.5 hours to obtain the gel reducing agent prepared by the cationic polymer. The invention adopts the method of polymerizing small cationic monomers to obtain a cationic polymer with higher molecular weight to prepare the glue reducing agent component. The cationic polymer structure has good designability, synergistic effect and compatibility with the water reducing agent. Good, can significantly reduce the amount of cementitious materials, and can improve the dispersibility, water retention and later strength of concrete.

Description

A kind of method for preparing glue reducer from cationic polymer

technical field

The invention relates to the technical field of building materials, in particular to a method for preparing a glue reducing agent from a cationic polymer.

Background technique

As a new generation of concrete admixtures, concrete binder reducer can better improve the workability of concrete and reduce the amount of cementitious materials in concrete. When used with water reducer, binder reducer can better exert its glue reducing effect. performance. The study found that cement particles are mainly composed of four major minerals, specifically tricalcium aluminate, tricalcium silicate, dicalcium silicate, and tetracalcium iron aluminate. These four minerals have charges with different positive and negative polarities. The resulting hydration products, cement particles combine with a large number of water molecules to form a large number of flocculation structures. The water reducing agent can open a part of the flocculation structure and improve the fluidity of the mixture, but it cannot produce effective dispersion effect in the face of another part of negatively charged cement particles. The negatively charged flocculation structure is dispersed.

Among the common glue reducer components, most of them are alkanolamine cationic small monomers, which disperse the negatively charged flocculation structure through electrostatic repulsion, and the dispersion effect has certain limitations. Ordinary glue reducers use small cationic monomers such as alcohol amine compounds to disperse part of the micro-aggregates, and use the electrostatic repulsion brought by the adsorption of small cationic monomers on the surface of negatively charged cement particles to achieve the effect of dispersing the flocculation structure. Ordinary glue reducers only rely on the characteristics of dispersing ability brought by electrostatic repulsion, which limits the development and application scope of glue reducers to a certain extent. Large-scale application promotion. Aiming at the problem of insufficient dispersion performance of small molecules, the idea of synthesizing cationic polymers with cationic small monomers can be used, so that the glue reducer can obtain a certain steric hindrance and greatly enhance the ability to disperse cement particles. At this stage, there are few studies on the preparation of glue reducers from polymerized cationic compounds, but they have the characteristics of stronger dispersion effect, which determines that their later development will be more and more important, and their applications will be more and more extensive.

Patent CN105906230A discloses a multifunctional glue reducer for high performance concrete and its preparation method, which is composed of modified polyether, mixed alcohol amine, mixed alcohol, unsaturated acid, modified siloxane, initiator and water. The multifunctional binder reducing agent for high-performance concrete of the invention can reduce the amount of cementitious materials used in concrete, and can keep the strength grade of concrete unchanged, and can improve the durability of concrete such as frost resistance and carbonization resistance.

Patent CN105036587A discloses a high-performance concrete synergist and its preparation method, which is composed of the following raw materials by weight: 5%-7% of the dispersing component, 10%-15% of the reinforcing component, and 3% of the active excitation component. %-5%, the complexing component is 2%-4%, and the balance is water. The high-performance concrete synergist of the invention can effectively improve the workability of concrete mixture, increase the strength of concrete, and improve the comprehensive performance of concrete. The cost.

Patent CN105174774A discloses and discloses a concrete glue reducer. The proportions of the components in the glue reducer are as follows: 100-120 parts of melamine, 400-500 parts of formaldehyde, 300-400 parts of water, 80 parts of salicylic acid -100 copies. Under the premise that the strength remains unchanged, the use of the glue reducing agent can reduce the cost of concrete and improve the performance of concrete.

Different from the above patents, the present invention introduces a cationic polymer into the glue reducer component, that is, a method of polymerizing a cationic small monomer into a cationic polymer, so that the glue reducer component has a certain steric hindrance effect, which significantly improves the The dispersing effect of the glue on the cement particles; the glue reducer has good compatibility with the water reducer, can improve the workability of concrete, and achieve the purpose of reducing the amount of cementitious materials.

SUMMARY OF THE INVENTION

The object of the present invention is to provide a method for preparing a glue reducing agent from a cationic polymer.

The design idea of the present invention is to focus on improving the dispersing ability of the glue reducer, and adopt the technical route of polymerizing cationic small monomers to add a certain steric hindrance to the components of the glue reducer, so as to further improve the glue reduction and dispersion of the glue reducer. ability.

The invention adopts the method of polymerizing small cationic monomers under certain process conditions to form cationic polymers with higher molecular weight, and the selected small cationic monomers for polymerization are quaternary ammonium salt cationic monomers. It is also soluble and has a synergistic effect, and has a good match with the water reducing agent; in the process of polymerizing the cationic compound, the amide compound is introduced as an important part of the main chain structure of the polymer, and the hysteresis of its hydrolysis is used to avoid as much as possible. The initial glue reducer competes with the water reducer for adsorption; at the same time, a phenyl functional monomer is introduced, and the large size and stability of its benzene ring structure are used to obtain a certain ability to resist layered strong adsorbates.

The invention adopts a multi-pronged approach in the technical route of preparing the cationic polymer, improves the dispersing ability and adaptability of the polymer in an all-round way, and uses the cationic polymer in combination with the alkanolamine cationic small monomer, and is used in organic polyols. Under the synergistic effect of lubricants and lubricants, the dispersing ability and adaptability of the glue reducing agent are significantly stronger than those of ordinary glue reducing agent products.

For achieving the above object, technical scheme of the present invention is as follows:

A method for preparing a glue reducer from a cationic polymer, characterized in that: the described cationic polymer prepares a glue reducer from the following components in parts by weight:

10-20 parts of alcohol amine compounds, 1-5 parts of organic polyols,

10-25 parts of cationic polymer, 0.05-0.1 part of lubricant, and the balance is water;

The above-mentioned components are put into the reaction kettle and fully stirred for 0.5 hour to obtain the glue reducing agent prepared by the cationic polymer;

Wherein: the cationic polymer contains the following components in parts by weight: 10-16 parts of amide compounds, 5-7 parts of sodium hypophosphite monohydrate, 2-4 parts of ammonium persulfate, 1-4 parts of thioglycolic acid, phenyl functional monohydrate 1-7 parts of body, 5-9 parts of quaternary ammonium salt cationic monomer, 2-6 parts of phosphate compound, 0.5-5 parts of unsaturated acid anhydride, 1-2 parts of sodium metabisulfite, sodium hydroxide solution whose mass fraction is 30% 8-12 parts, the balance is water; the mass fraction of the finished product after preparation is 40%; the preparation method is carried out according to the following steps:

1), join 10-16 parts of amide compounds, 2-6 parts of phosphoric acid ester compounds, 0.5-5 parts of unsaturated acid anhydrides, 5-7 parts of sodium hypophosphite monohydrate and 10-30 parts of water in the reactor, Stir to dissolve;

2), measure the temperature in the kettle, control the temperature at 5-25 ℃, after the temperature is stable, add 2-4 parts of ammonium persulfate at one time;

3) After adding ammonium persulfate for 5 minutes, start to drip solution A and solution B in turn, after adding solution A, start dripping solution B within 10 minutes, the solution B dripping time is 1-3 hours, solution A dripping The time is 1.5-3.5 hours; solution A consists of 1-4 parts of thioglycolic acid and 20-40 parts of water, solution B consists of 5-9 parts of quaternary ammonium salt cationic monomer, 1-7 parts of phenyl functional monomer and 10- 25 parts water composition;

4), after the dripping finishes, add 1-2 parts of sodium metabisulfite at one time, the curing time is 0.5-2 hours, cool after curing, when the temperature of the reaction solution is lower than 30 ℃, slowly add 8-12 parts of mass fraction to be 30 % sodium hydroxide solution, add water to 100 parts, and after stirring evenly, a cationic polymer with a mass fraction of 40% is obtained.

The alcoholamine compounds are butylethanolamine, methyldiethanolamine, L-phosphatidylethanolamine, N-(3-aminopropyl)diethanolamine, N,N-diisopropylethanolamine, dodecylbenzene Sulfonic acid triethanolamine, N-(2-amino-4-nitrophenyl)ethanolamine, 1,2-dilauroylphosphatidylethanolamine, Jinggang mycoholamine, phenylacetolamine, oleic acid monoethanolamine, oleic acid triethanolamine One or more compositions of ethanolamine, N-phenylethanolamine, triethanolamine hydroiodic acid, eccans triethanolamine, diacetylethanolamine and tert-butylethanolamine.

Described organic polyhydric alcohol is one or more compositions of ethylene glycol, diethylene glycol, propylene glycol, glycerol, dipolyglycerol, and tripolyglycerol;

The lubricant is composed of organosiloxane lubricants, hydrocarbon lubricants, fatty acid amide lubricants, and metal soap lubricants, and is specifically composed of polydimethylsiloxane, polymethylphenylsiloxane, Polydiethylsiloxane, polyethylene wax, oxidized polyethylene wax, chlorinated paraffin, stearic acid amide, oleic acid amide, N,N-ethylenebisstearic acid amide, erucic acid amide, stearic acid One or more compositions of n-butyl ester, triglyceride stearate, calcium stearate, and sodium stearate; preferably a compound lubricant; preferably a combination of a fatty acid amide lubricant and a metal soap lubricant.

The amide compounds are 2-acrylamide-2-methylpropanesulfonic acid, acrylamide, methacrylamide, N-methyl-2-acrylamide, N-methyl-1-ethylenesulfonamide, N - Methylol acrylamide, N-isopropyl methacrylamide, N-tert-butylmethacrylamide, N-cyclohexyl methacrylamide, 3-acrylamide-3-methylbutyric acid, N-(iso One or more compositions of butoxymethyl)acrylamide and N-methacryloylglycine;

The quaternary ammonium salt cationic monomers are diallyl quaternary ammonium salts, acrylamide alkyl quaternary ammonium salts, preferably acryloyloxyalkyl quaternary ammonium salts cationic monomers, namely methacryloyloxyethene. One or two compositions of trimethylammonium chloride (DMC) and acryloyloxyethyltrimethylammonium chloride (DAC); the composition of DMC and DAC with a mass ratio of 1:1 is preferred;

Described phosphate ester compound is dimethyl-vinyl phosphate, polyoxyethylene ether glycerol phosphate, 2,4,6-tris (1-phenylethyl) polyoxyethylene phosphate, bistris One or more compositions of methyl silylated vinyl phosphate, methacryloyloxyethyl phosphate and ethylene glycol methacrylate phosphate; preferably high molecular polymer phosphate; preferably the mass ratio is A 1:1 composition of polyoxyethylene ether glycerol phosphate and 2,4,6-tris(1-phenylethyl)polyoxyethylenated phosphate.

The unsaturated acid anhydride is composed of acrylic anhydride, crotonic anhydride, 2-buten-1-yl succinic anhydride, isobutenyl succinic anhydride, angelic anhydride, maleic anhydride, decenyl succinic anhydride, pentadecenyl One or more compositions of succinic anhydride, dodecenyl succinic anhydride, (2-methyl-2-propen-1-yl) succinic anhydride, itaconic anhydride and 4-methacryloyloxyethyl trimellitic anhydride ; preferably an unsaturated acid anhydride with a large molecular weight and a certain steric hindrance ability; preferably 4-methacryloyloxyethyl trimellitic anhydride with a phenyl group.

Described phenyl functional monomer is one or more compositions of methacryloyloxyethyl trimellitic anhydride, methacryloyloxyethyl phthalic acid monoester, and hydroxyethyl dimethacrylate of phthalic anhydride ;

Compared with the prior art, the beneficial effects of the present invention are:

1. The present invention adopts the method of polymerizing a cationic small monomer to obtain a cationic polymer with a higher molecular weight to prepare the glue reducing agent component, and the cationic polymer structure has good designability; the selected cationic small monomer for polymerization is quaternary ammonium Salt cationic monomer, this kind of cationic substance is not only compatible with anion, but also has synergistic effect, and has good compatibility with water reducing agent;

2. In the process of polymerizing cationic compounds, the present invention introduces amide compounds and unsaturated carboxylic acids as important components of the polymer main chain structure, and uses the hysteresis of hydrolysis to avoid the competition between the initial glue reducer and the water reducer as much as possible. Adsorption; at the same time, phenyl functional monomer is also introduced, and the large size and stability of its benzene ring structure are used to obtain a certain ability to resist layered strong adsorbates; phosphoric acid groups are introduced to improve the initial anchoring ability;

3. In the present invention, the cationic polymer is used in combination with the alkanolamine cationic small monomer, and under the synergistic effect of organic polyols and lubricants, the dispersing ability and adaptability of the glue reducing agent are significantly stronger than those of ordinary glue reducing agent products. The obtained glue reducing agent has good matching performance with the water reducing agent, can significantly reduce the amount of cementitious materials, and can improve the dispersibility, water retention and later strength of concrete.

Detailed ways

The technical solutions of the present invention are further described clearly and completely below in conjunction with the embodiments.

Embodiment 1 (each component dosage is weight part)

1. Preparation of cationic polymer: The preparation method of cationic polymer is carried out as follows:

1), 10 parts of 2-acrylamide-2-methylpropanesulfonic acid, 6 parts of dimethyl-vinyl phosphate, 0.5 parts of acrylic anhydride, 7 parts of sodium hypophosphite monohydrate and 30 parts of water were added to the reaction. In the kettle, stir to dissolve;

2), measure the temperature in the kettle, control the temperature at 5 ℃, after the temperature is stable, add 2 parts of ammonium persulfate at one time;

3) After adding ammonium persulfate for 5 minutes, start dripping solution A and solution B in turn, after adding solution A, start dripping solution B within 10 minutes, the dripping time of solution B is 0.5 hour, and the dripping time of solution A is 1 hour; solution A consists of 1 part thioglycolic acid and 20 parts water, solution B consists of 5 parts methacryloyloxyethyltrimethylammonium chloride (DMC), 1 part methacryloyloxyethyl trimellitic anhydride and 10 parts water composition;

4), after dripping is finished, add 1 part of sodium metabisulfite at one time, ripen for 2 hours, cool after ripening, when the temperature of the reaction solution is lower than 30 ° C, slowly add 8 parts of sodium hydroxide solution whose mass fraction is 30%, replenish water. to 100 parts, and after stirring uniformly, a cationic polymer with a mass fraction of 40% is obtained.

2. Preparation of glue reducing agent: the glue reducing agent comprises the following components in parts by weight: 10 parts of butyl ethanolamine, 5 parts of ethylene glycol, 10 parts of cationic polymer, 0.05 part of organosiloxane lubricant, and the balance is water. The above components are put into the reaction kettle and fully stirred for 0.5 hour to obtain the gel reducing agent prepared from the cationic polymer.

Embodiment 2 (each component dosage is weight part)

1. Preparation of cationic polymer: The preparation method of cationic polymer is carried out as follows:

1), 11 parts of N-methyl-1-ethylene sulfonamide, 5.5 parts of ethylene glycol methacrylate phosphate, 1 part of decenyl succinic anhydride, 6.8 parts of sodium hypophosphite monohydrate and 25 parts of water Add to the reactor, stir to dissolve;

2), measure the temperature in the kettle, control the temperature at 8 ℃, after the temperature is stable, add 2.4 parts of ammonium persulfate at one time;

3) After adding ammonium persulfate for 5 minutes, start to drip solution A and solution B successively, after adding solution A, start dripping solution B within 10 minutes, the dripping time of solution B is 1.3 hours, and the dripping time of solution A is 1.8 hours; solution A consists of 1-4 parts of thioglycolic acid and 24 parts of water, solution B consists of 6 parts of the composition of DMC and DAC with a mass ratio of 1:1, methacryloyloxyethyl phthalate monoester 2 parts and 12 parts water;

4), after the dripping finishes, add 1.2 parts of sodium metabisulfite at one time, ripen for 1.4 hours, cool after the ripening, and when the temperature of the reaction solution is lower than 30 ° C, slowly add 9 parts of sodium hydroxide solution whose mass fraction is 30%, and replenish water. to 100 parts, and after stirring uniformly, a cationic polymer with a mass fraction of 40% is obtained.

2. Preparation of the gum reducing agent: the gum reducing agent comprises the following components in parts by weight: 12 parts of L-phosphatidylethanolamine, 4.6 parts of diethylene glycol, 11 parts of cationic polymer, 0.06 part of polymethylphenylsiloxane, The remainder is water. The above components are put into the reaction kettle and fully stirred for 0.5 hour to obtain the gel reducing agent prepared from the cationic polymer.

Embodiment 3 (each component consumption is weight part)

1. Preparation of cationic polymer: The preparation method of cationic polymer is carried out as follows:

1), add 12 parts of N-methylol acrylamide, 4.8 parts of bis-trimethyl silylated vinyl phosphate, 2 parts of crotonic anhydride, 6.4 parts of sodium hypophosphite monohydrate and 22 parts of water to the reactor , stir to dissolve;

2), measure the temperature in the kettle, control the temperature at 12 ° C, and after the temperature is stable, add 2.8 parts of ammonium persulfate at one time;

3) After adding ammonium persulfate for 5 minutes, start dripping solution A and solution B in turn, after adding solution A, start dripping solution B within 10 minutes, the dripping time of solution B is 1.7 hours, and the dripping time of solution A is 2.2 hours; solution A consisted of 2 parts thioglycolic acid and 28 parts water, solution B consisted of 7 parts acryloyloxyethyltrimethylammonium chloride (DAC), 4 parts hydroxyethyl phthalic anhydride dimethacrylate and 14 parts water;

4), after the dropping is finished, add 1.4 parts of sodium metabisulfite at one time, ripen for 1 hour, cool after the ripening, and when the temperature of the reaction solution is lower than 30 ° C, slowly add 10 parts of sodium hydroxide solution whose mass fraction is 30%, and replenish water. to 100 parts, and after stirring uniformly, a cationic polymer with a mass fraction of 40% is obtained.

2. Preparation of glue reducing agent: The glue reducing agent comprises the following components in parts by weight: 14 parts of Jinggang mycophenolate, 3.8 parts of diglycerol, 12 parts of cationic polymer, 0.07 part of oleic acid amide, and the balance is water. The above components are put into the reaction kettle and fully stirred for 0.5 hour to obtain the gel reducing agent prepared from the cationic polymer.

Embodiment 4 (each component consumption is weight part)

1. Preparation of cationic polymer: The preparation method of cationic polymer is carried out as follows:

1), 13 parts of N-tert-butylmethacrylamide, 3 parts of 2,4,6-tris (1-phenylethyl) polyoxyethylene phosphate, 3 parts of pentadecenyl succinic anhydride, 6 parts of a Sodium hypophosphite and 18 parts of water were added to the reactor, and stirred to dissolve;

2), measure the temperature in the kettle, control the temperature at 20 ° C, and after the temperature is stable, add 3.2 parts of ammonium persulfate at one time;

3) After adding ammonium persulfate for 5 minutes, start to drip solution A and solution B successively, after adding solution A, start dripping solution B within 10 minutes, the dripping time of solution B is 1.9 hours, and the dripping time of solution A is 2.4 hours; solution A consisted of 3 parts thioglycolic acid and 32 parts water, solution B consisted of 7.8 parts acryloyloxyethyltrimethylammonium chloride (DAC), 5 parts methacryloxyethyl trimellitic anhydride and 20 parts water composition;

4), after the dripping finishes, add 1.6 parts of sodium metabisulfite at one time, ripen for 0.8 hours, cool after the ripening, and when the temperature of the reaction solution is lower than 30 ° C, slowly add 10.5 parts of sodium hydroxide solution whose mass fraction is 30%, and replenish water. to 100 parts, and after stirring uniformly, a cationic polymer with a mass fraction of 40% is obtained.

2. Preparation of glue reducing agent: The glue reducing agent comprises the following components in parts by weight: 16 parts of ethanolamine phenylacetate, 3 parts of glycerol, 13 parts of cationic polymer, 0.08 part of polyethylene wax, and the balance is water. The above components are put into the reaction kettle and fully stirred for 0.5 hour to obtain the gel reducing agent prepared from the cationic polymer.

Embodiment 5 (each component dosage is weight part)

1. Preparation of cationic polymer: The preparation method of cationic polymer is carried out as follows:

1), 15 parts of N-methacryloyl glycine 2.6 methacryloyl oxyethyl phosphate, 4 dodecenyl succinic anhydride, 5.5 parts of sodium hypophosphite monohydrate and 14 parts of water are added in the reactor , stir to dissolve;

2), measure the temperature in the kettle, control the temperature at 22 ° C, and after the temperature is stable, add 3.6 parts of ammonium persulfate at one time;

3) After adding ammonium persulfate for 5 minutes, start to drip solution A and solution B successively, after adding solution A, start dripping solution B within 10 minutes, the dripping time of solution B is 2.3 hours, and the dripping time of solution A is 2.8 hours; solution A consists of 3.5 parts of thioglycolic acid and 36 parts of water, solution B consists of 8.4 parts of methacryloyloxyethyltrimethylammonium chloride (DMC), 6 parts of methacryloyloxyethyl trimellitic anhydride and 22 parts of water composition;

4), after the dripping finishes, add 1.8 parts of sodium metabisulfite at one time, ripen for 0.6 hours, cool after the ripening, and when the temperature of the reaction solution is lower than 30 ° C, slowly add 11 parts of sodium hydroxide solution whose mass fraction is 30%, and replenish water. to 100 parts, and after stirring uniformly, a cationic polymer with a mass fraction of 40% is obtained.

2. Preparation of glue reducing agent: The glue reducing agent comprises the following components in parts by weight: 18 parts of oleic acid monoethanolamine, 2 parts of diglycerol, 14 parts of cationic polymer, 0.09 part of chlorinated paraffin, and the balance is water. The above components are put into the reaction kettle and fully stirred for half an hour to obtain the glue reducing agent prepared from the cationic polymer.

Embodiment 6 (each component consumption is weight part)

1. Preparation of cationic polymer: The preparation method of cationic polymer is carried out as follows:

1), 16 parts of N-methacryloyl glycine, 2 parts of ethylene glycol methacrylate phosphates, 5 parts of itaconic anhydride, 5 parts of sodium hypophosphite monohydrate and 10 parts of water are joined in the reactor, Stir to dissolve;

2), measure the temperature in the kettle, control the temperature at 25 ° C, and after the temperature is stable, add 4 parts of ammonium persulfate at one time;

3) After adding ammonium persulfate for 5 minutes, start to drip solution A and solution B successively, after adding solution A, start dripping solution B within 10 minutes, the dripping time of solution B is 2.5 hours, and the dripping time of solution A is 2.5 hours. 3 hours; solution A consists of 4 parts thioglycolic acid and 40 parts water, solution B consists of 9 parts acryloyloxyethyltrimethylammonium chloride (DAC) 7 parts hydroxyethyl dimethacrylate and 25 parts water composition;

4), after the dropwise addition, add 2 parts of sodium metabisulfite at one time, ripen for 0.5 hours, cool after the ripening, and when the temperature of the reaction solution is lower than 30 ° C, slowly add 12 parts of sodium hydroxide solution whose mass fraction is 30%, and replenish water. to 100 parts, and after stirring uniformly, a cationic polymer with a mass fraction of 40% is obtained.

2. Preparation of glue reducing agent: The glue reducing agent comprises the following components in parts by weight: 20 parts of tert-butyl ethanolamine, 1 part of triglyceride, 25 parts of cationic polymer, 0.1 part of sodium stearate, and the balance is water. The above components are put into the reaction kettle and fully stirred for half an hour to obtain the glue reducing agent prepared from the cationic polymer.

Example test results

The test took C50 concrete as the object (Table 1), the cement was Huaxing 42.5 ordinary Portland cement, the sand was river sand with a fineness modulus of 2.5, the stones were 5-25mm continuous graded crushed stone, and the water reducing agent was ordinary Commercially available polycarboxylate water reducer. The concrete sizing reducer prepared in Examples 1-6 was applied to concrete, and compared with the blank example without sizing reducing agent. The performance of the concrete mixture is tested in accordance with GB/T50080 "Standard for Test Methods of Performance of Ordinary Concrete Mixtures"; the strength of concrete is tested in accordance with GB/T50081 "Standard for Test Method of Mechanical Properties of Ordinary Concrete".

Table 1 C50 concrete mix ratio

cement fly ash sand stone water water reducer 280 80 820 1050 170 7.5

Without changing the mix ratio of the concrete, the glue reducing agent prepared by the cationic polymer was added, and the dosage was 0.4% of the amount of the cementitious material. The performance test results of the concrete mixture are shown in Table 2.

Table 2 Concrete performance test results

It can be seen from the experimental results in Table 2 that the initial slump/expansion and 1h slump/expansion of the concrete are greatly improved after adding the glue reducer prepared by the cationic polymer of the present invention to the concrete. , and the 7d, 28d and 60d have all been greatly improved.

Adjust the concrete mix ratio, reduce the cement consumption, carry out the concrete test with the concrete glue reducing agent prepared by embodiment 1-6, the concrete adjustment mix ratio is shown in Table 3, and the concrete mixture performance and mechanical property test results are shown in Table 4 (blank example adopts The original mixing ratio, other embodiments all adopt the adjusted mixing ratio).

Table 3 C50 concrete mix ratio adjustment

cement fly ash sand stone water water reducer glue reducer 280 80 820 1050 170 7.5 0 238 80 840 1080 157 7.5 1.7

Table 4 Concrete performance test results after adjustment

As can be seen from the test data in Table 4, after adding the concrete glue reducer of the present invention, under the condition that the cement consumption is reduced by 15%, the workability of the concrete of Example 1-6 is still better than that of the blank example, and Example 1-6 The strengths of 7d, 28d and 60d are also slightly improved compared to the blank.

To sum up, the glue reducer prepared by the cationic polymer of the present invention can obviously improve the workability of concrete, and at the same time, the strength of concrete can be improved, and the amount of concrete can be reduced by 15%, which brings great advantages to the concrete industry. huge economic benefits.

All features disclosed in this specification, or all formulations and dosages disclosed, except mutually exclusive features and/or formulations, dosages, may be combined in any way. Any feature disclosed in this specification (including claims, abstract), unless expressly stated otherwise, may be replaced by other equivalent or alternative features serving a similar purpose. That is, unless expressly stated otherwise, each feature is but one example of a series of equivalent or similar features.

The above are only non-limiting embodiments of the invention, and a large number of examples can also be derived. For those of ordinary skill in the art, without departing from the inventive concept of the present invention and without creative work, they can also do There are several modified and improved embodiments, which all belong to the protection scope of the present invention.

Claims (9)

1. a method for preparing glue reducing agent by cationic polymer, is characterized in that: described cationic polymer preparing glue reducing agent is prepared from following components by weight: 10-20 parts of alcohol amine compounds, 1-5 parts of organic polyols, 10-25 parts of cationic polymer, 0.05-0.1 part of lubricant, and the balance is water; The above-mentioned components are put into the reaction kettle and fully stirred for 0.5 hour to obtain the glue reducing agent prepared by the cationic polymer; Wherein: the cationic polymer contains the following components in parts by weight: 10-16 parts of amide compounds, 5-7 parts of sodium hypophosphite monohydrate, 2-4 parts of ammonium persulfate, 1-4 parts of thioglycolic acid, phenyl functional monohydrate 1-7 parts of body, 5-9 parts of quaternary ammonium salt cationic monomer, 2-6 parts of phosphate compound, 0.5-5 parts of unsaturated acid anhydride, 1-2 parts of sodium metabisulfite, sodium hydroxide solution whose mass fraction is 30% 8-12 parts, the balance is water; the mass fraction of the finished product after preparation is 40%; the preparation method is carried out according to the following steps: 1), join 10-16 parts of amide compounds, 2-6 parts of phosphoric acid ester compounds, 0.5-5 parts of unsaturated acid anhydrides, 5-7 parts of sodium hypophosphite monohydrate and 10-30 parts of water in the reactor, Stir to dissolve; 2), measure the temperature in the kettle, control the temperature at 5-25 ℃, after the temperature is stable, add 2-4 parts of ammonium persulfate at one time; 3) After adding ammonium persulfate for 5 minutes, start to drip solution A and solution B in turn, after adding solution A, start dripping solution B within 10 minutes, the solution B dripping time is 1-3 hours, solution A dripping The time is 1.5-3.5 hours; solution A consists of 1-4 parts of thioglycolic acid and 20-40 parts of water, solution B consists of 5-9 parts of quaternary ammonium salt cationic monomer, 1-7 parts of phenyl functional monomer and 10- 25 parts water composition; 4), after the dropwise addition, add 1-2 parts of sodium metabisulfite at one time, the curing time is 0.5-2 hours, cool after curing, when the temperature of the reaction solution is lower than 30 ℃, slowly add 8-12 parts of liquid caustic soda, replenish water to 100 parts, and after stirring evenly, a cationic polymer with a mass fraction of 40% is obtained. 2. cationic polymer according to claim 1 prepares the method for gel reducing agent, it is characterized in that: described alcoholamine compound is butylethanolamine, methyldiethanolamine, L-phosphatidylethanolamine, N-(3 -aminopropyl)diethanolamine, N,N-diisopropylethanolamine, triethanolamine dodecylbenzenesulfonate, N-(2-amino-4-nitrophenyl)ethanolamine, 1,2-dilaurin Acylphosphatidylethanolamine, Jinggang mycoholamine, phenylacetolamine, oleic acid monoethanolamine, oleic acid triethanolamine, N-phenylethanolamine, hydriodic acid triethanolamine, ecponsu triethanolamine, diacetylethanolamine, tert-butyl One or more compositions of ethanolamine. 3. cationic polymer according to claim 1 prepares the method for glue reducing agent, it is characterized in that: described organic polyhydric alcohol is ethylene glycol, diethylene glycol, propylene glycol, glycerol, dipolyglycerol, One or more compositions of triglycerol. 4. the method for preparing glue reducer by cationic polymer according to claim 1, is characterized in that: described lubricant is polydimethylsiloxane, polymethylphenylsiloxane, polydiethyl Silicone, polyethylene wax, oxidized polyethylene wax, chlorinated paraffin, stearic acid amide, oleic acid amide, N,N-ethylenebisstearic acid amide, erucic acid amide, n-butyl stearate, One or more compositions of triglyceride stearate, calcium stearate and sodium stearate. 5. the method for preparing glue reducer by cationic polymer according to claim 1, is characterized in that: described amide compound is 2-acrylamide-2-methylpropanesulfonic acid, acrylamide, methacrylamide , N-methyl-2-acrylamide, N-methyl-1-ethylenesulfonamide, N-methylol acrylamide, N-isopropyl methacrylamide, N-tert-butylmethacrylamide, N- One or more compositions of cyclohexylmethacrylamide, 3-acrylamide-3-methylbutyric acid, N-(isobutoxymethyl)acrylamide and N-methacryloylglycine. 6. the method for preparing glue reducer from cationic polymer according to claim 1 is characterized in that: described quaternary ammonium salt cationic monomer is diallyl quaternary ammonium salts, acrylamide alkyl quaternary ammonium salts of one or both combinations. 7. cationic polymer according to claim 1 prepares the method for reducing agent, it is characterized in that: described phosphoric acid ester compound is dimethyl-vinyl phosphate, polyoxyethylene ether glycerol phosphate, 2 , 4,6-tris(1-phenylethyl) polyoxyethylene phosphate, bistrimethylsilyl vinyl phosphate, methacryloyloxyethyl phosphate, ethylene glycol methacrylate One or more compositions of phosphate esters. 8. cationic polymer according to claim 1 prepares the method for glue reducer, it is characterized in that: described unsaturated acid anhydride is acrylic anhydride, crotonic anhydride, 2-buten-1-yl succinic anhydride, isobutenyl Succinic anhydride, Angelic anhydride, Maleic anhydride, Decenylsuccinic anhydride, Pentadecenylsuccinic anhydride, Dodecenylsuccinic anhydride, (2-methyl-2-propen-1-yl)succinic anhydride , itaconic anhydride, one or more compositions of 4-methacryloyloxyethyl trimellitic anhydride. 9. cationic polymer according to claim 1 prepares the method for gel reducing agent, it is characterized in that: described phenyl functional monomer is methacryloyloxyethyl trimellitic anhydride, methacryloyloxyethyl o-phenylene One or more compositions of diformic acid monoester and hydroxyethyl dimethacrylate.