CN105016645A - Concrete mud resisting agent based on counter-insert layer design and preparing method thereof - Google Patents
Concrete mud resisting agent based on counter-insert layer design and preparing method thereof Download PDFInfo
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- CN105016645A CN105016645A CN201510484284.0A CN201510484284A CN105016645A CN 105016645 A CN105016645 A CN 105016645A CN 201510484284 A CN201510484284 A CN 201510484284A CN 105016645 A CN105016645 A CN 105016645A
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Abstract
The invention relates to a concrete mud resisting agent based on counter-insert layer design and a preparing method. The method comprises the following steps that micro-molecule monomers, 2-butenoic acid, sodium methallyl sulfonate and hydroxyethyl methacrylate are stirred, dissolved and kept at the temperature of 70 DEG C-75 DEG C to obtain a uniform solution, then an oxidizing agent is added, and the mixture is stirred to obtain a uniform solution; a reducing agent and chain transfer agent mixture is added in a one-time mode, the mixture continues to be stirred for 2-4 h, pH is adjusted to be 8-9, and a proper amount of deionized water is added, so that the concrete mud resisting agent based on the counter-insert layer design is obtained. The method has the advantages that the prepared concrete mud resisting agent is provided with positive-charge functional group monomers, has a good ability to be adsorbed by montmorillonite clay preferentially, and can well stop polycarboxylate superplasticizer from being adsorbed between montmorillonite layers; the concrete mud resisting agent is high in adaptability, initial slump of concrete is increased, and the concrete has good workability.
Description
Technical field
The invention belongs to additive for building material field, be specifically related to a kind of agent on crack resistance of concrete mud agent based on the design of anti-plug layer and preparation method.
Background technology
In recent years, along with the development of Chinese society economy, the demand of build concrete is increasing, and sandstone consumption sharply increases, and the sand and stone resources of high-quality is exhausted.The most silt content of sandstone of current use is higher, and grating is unreasonable.Mud in sandstone is a kind of clay mineral, main component is montmorillonite, it is layer silicate mineral, the sandstone that silt content is higher can have significant impact on the concrete performance mixing polycarboxylate water-reducer, particularly when sandstone silt content is more than 5%, can make that workability of concrete is bad or slump-loss is excessive, workability is bad.
Montmorillonite due to interlamellar spacing size scalability change greatly, extremely strong to the adsorptive power of water and polycarboxylate water-reducer, therefore when containing mud in sandstone, polycarboxylate water-reducer and water can be preferentially adsorbed on the interlayer of montmorillonite, cause being adsorbed on polycarboxylate water-reducer, the water yield in the polycarboxylate water-reducer of cement particle surface and liquid phase greatly to reduce, this makes the dispersiveness of cement granules greatly reduce, and the concrete slump is sharply lost.The way of current this problem of solution strengthens polycarboxylate water-reducer consumption to contain mud to the impact of polycarboxylate water-reducer to reduce sandstone, does like this and both polycarboxylate water-reducer consumption can not made to float comparatively greatly for essential problem, and can strengthen construction cost.Therefore study a kind of can preferentially by adsorption by clay and the agent on crack resistance of concrete mud agent being packed into the adsorption space between clay seam is that tool has very great significance based on anti-plug layer, it polycarboxylate water-reducer in prevention system further and free water can enter clay layer inside, effectively can lower concrete slump loss.
Summary of the invention
Technical problem to be solved by this invention proposes a kind of agent on crack resistance of concrete mud agent based on the design of anti-plug layer and preparation method, it can be preferentially adsorbed between clay seam effectively, stop polycarboxylate water-reducer and water to be adsorbed between clay seam, greatly improve concrete mobility and reduce slump-loss.
The problem that the present invention is the above-mentioned proposition of solution by the following technical solutions: based on anti-plug layer design the agent of agent on crack resistance of concrete mud, its general structure is:
Wherein, a=20 ~ 30, b=5 ~ 10, c=10 ~ 15, d=10 ~ 20, its molecular weight is 8000 ~ 13500.
The preparation method of the described agent on crack resistance of concrete mud agent based on the design of anti-plug layer, includes following steps:
A) starting material are chosen: by the chain-transfer agent of 40 ~ 60wt% small molecule monomer, 20 ~ 35wt%2-butenoic acid, 10 ~ 25% methylpropene sodium sulfonates, 8 ~ 24wt% hydroxyethyl methylacrylate, the oxygenant of 0.5 ~ 1.5wt%, the reductive agent of 1.0 ~ 1.5wt% and 0.5 ~ 1.0wt%, each component total amount is 100% above, chooses starting material;
B) by described small molecule monomer, 2-butylene acid, methylpropene sodium sulfonate, hydroxyethyl methylacrylate stirring and dissolving, keep 70 ~ 75 DEG C of temperature, obtain homogeneous solution, then add oxygenant, stir and obtain homogeneous solution;
C) by poly-for step 2) in institute obtain in homogeneous solution, disposable reductive agent and the chain-transfer agent mixture of adding, and continue stirring 2 ~ 4h, regulates pH to 8 ~ 9, adds suitable deionized water, obtain the agent on crack resistance of concrete mud agent based on the design of anti-plug layer.
By such scheme, described small molecule monomer is the vinyl-based small molecule monomer with cationic charge, and its molecular structure is as follows:
By such scheme, the preparation method of the described vinyl-based small molecule monomer with cationic charge is as follows:
A) maleic anhydride and acetone catalyzer are uniformly mixed in encloses container, are warming up to 5 ~ 7 DEG C, and are incubated 0.5h;
B) keep temperature-resistant, evenly add dimethylethanolamine at 10min, and be incubated 8h;
C) after completion of the reaction by solution for vacuum suction filtration, clean filter cake with acetone, vacuum-drying obtains pressed powder;
D) above-mentioned pressed powder is dissolved in distilled water, regulates pH to 8 ~ 9, add sodium chloroacetate, regulate temperature to 30 ~ 35 DEG C, and be incubated 9h, obtain the vinyl-based small molecule monomer with cationic charge;
Wherein, step a), b), d) in used maleic anhydride: dimethylethanolamine: the mass ratio of sodium chloroacetate is 1:1:1, the consumption of acetone is 4 ~ 5 times of maleic anhydride quality.
By such scheme, described oxygenant is ammonium persulphate, any one or two kinds in hydrogen peroxide, Potassium Persulphate mix, and its mol ratio is 1:1.
By such scheme, described reductive agent is the Sulfothiorine of equimolar ratio, any two or three in S-WAT, L-AA mixes.
By such scheme, described chain-transfer agent is mercaptoethanol, one or both in thiohydracrylic acid mix, and during two kinds of mixing, mol ratio is 2:1.
Reaction equation involved in the present invention:
A) with the vinyl-based small molecule monomer building-up reactions equation of cationic charge:
B) agent on crack resistance of concrete mud agent building-up reactions equation:
Effect of the present invention is:
1. the agent on crack resistance of concrete mud agent prepared of the present invention is with positive functional groups's monomer, has and is well preferentially adsorbed ability, polycarboxylate water-reducer can be stoped very well to be adsorbed between montmorillonite layer for smectite-group clay;
2. the agent on crack resistance of concrete mud agent strong adaptability prepared of the present invention, has good adaptability for the larger concrete of sandstone silt content scope fluctuation;
3. the agent on crack resistance of concrete mud agent prepared of the present invention is compared with the anti-mud agent of commercially available general concrete, and raising concrete initial slump that can be larger, has good workability.
Embodiment
For illustrating further content of the present invention, exemplifying following examples especially and the present invention is described in further detail.Embodiment provides by way of illustration, but is never only confined to content of the present invention.Protection scope of the present invention is as the criterion with claim specification sheets.
Based on an agent on crack resistance of concrete mud agent for anti-plug layer design, it is characterized in that, its molecular weight is 8000 ~ 13500, and its general structure is:
Wherein, a=20 ~ 30, b=5 ~ 10, c=10 ~ 15, d=10 ~ 20.
Embodiment proportioning is as shown in table 1, and specific implementation process is as follows:
1) by small molecule monomer, 2-butylene acid, methylpropene sodium sulfonate, hydroxyethyl methylacrylate stirring and dissolving, keep 70 ~ 75 DEG C of temperature, obtain homogeneous solution, then add oxygenant, stir and obtain homogeneous solution;
2) by poly-for step 1) in institute obtain in homogeneous solution, disposable reductive agent and the chain-transfer agent mixture of adding, and continue stirring 2 ~ 4h, regulates pH to 8 ~ 9, adds suitable deionized water, obtain a kind of agent on crack resistance of concrete mud agent based on the design of anti-plug layer.
Wherein, small molecule monomer is the vinyl-based small molecule monomer with cationic charge, and its molecular structure is as follows:
Its preparation method is as follows:
A) maleic anhydride and acetone catalyzer are uniformly mixed in encloses container, are warming up to 5 ~ 7 DEG C, and are incubated 0.5h;
B) keep temperature-resistant, evenly add dimethylethanolamine at 10min, and be incubated 8h;
C) after completion of the reaction by solution for vacuum suction filtration, clean filter cake with acetone, vacuum-drying obtains pressed powder in one day;
D) above-mentioned pressed powder is dissolved in distilled water, regulates pH to 8 ~ 9, add sodium chloroacetate, regulate temperature to 30 ~ 35 DEG C, and be incubated 9h, obtain the vinyl-based small molecule monomer with cationic charge;
Wherein, maleic anhydride used in step a, b, d: dimethylethanolamine: the mass ratio of sodium chloroacetate is 1:1:1, the consumption of acetone is 4 ~ 5 times of maleic anhydride quality.
The agent on crack resistance of concrete mud agent material proportioning that one kind, table 1 designs based on anti-plug layer
Wherein oxygenant is ammonium persulphate, two kinds, hydrogen peroxide mixes, and mol ratio is 1:1;
A1-A4 reductive agent is S-WAT, S-WAT two kinds mixes, and mol ratio is 1:1;
A5-A8 reductive agent is S-WAT, sodium bisulfite, L-AA three kinds mix, and mol ratio is 1:1:1;
Chain-transfer agent is the mixture of mercaptoethanol, thiohydracrylic acid, and mol ratio is 2:1.
To the evaluation of the product of above 8 embodiments
Concrete slump and divergence test are carried out according to GB/T 50080-2002 " Standard for test methods of properties of ordinary concrete mixture standard (attached provision explanation) " regulation, and concrete mix is as shown in table 2, and the effect of anti-mud agent is as shown in table 3.
Table 2 concrete mix
Note: in experiment, cement used is the new P.O 42.5 of China, and sandstone silt content is 9%.
Table 3 agent on crack resistance of concrete mud agent effect
Note: A01 anti-mud agent used is commercially available general anti-mud agent.
As can be seen from above analysis, when not adding anti-mud agent, concrete slump only has about 120mm, and workability is poor; When adding the anti-mud agent of commercially available general concrete, concrete initial slump improves, and does not add compared with anti-mud agent, and increase rate is little; For the agent on crack resistance of concrete mud agent adding A1 ~ A8 embodiment, concrete initial slump, substantially all at more than 205mm, has good workability, and therefore this technological invention product can be widely used in the high concrete of gravel content, improve concrete slump, improve workability.
Claims (7)
1., based on the agent on crack resistance of concrete mud agent of anti-plug layer design, its general structure is:
Wherein, a=20 ~ 30, b=5 ~ 10, c=10 ~ 15, d=10 ~ 20, its molecular weight is 8000 ~ 13500.
2. the preparation method of the agent on crack resistance of concrete mud agent based on the design of anti-plug layer according to claim 1, includes following steps:
A) starting material are chosen: by the chain-transfer agent of 40 ~ 60wt% small molecule monomer, 20 ~ 35wt%2-butenoic acid, 10 ~ 25% methylpropene sodium sulfonates, 8 ~ 24wt% hydroxyethyl methylacrylate, the oxygenant of 0.5 ~ 1.5wt%, the reductive agent of 1.0 ~ 1.5wt% and 0.5 ~ 1.0wt%, each component total amount is 100% above, chooses starting material;
B) by described small molecule monomer, 2-butylene acid, methylpropene sodium sulfonate, hydroxyethyl methylacrylate stirring and dissolving, keep 70 ~ 75 DEG C of temperature, obtain homogeneous solution, then add oxygenant, stir and obtain homogeneous solution;
C) by poly-for step 2) in institute obtain in homogeneous solution, disposable reductive agent and the chain-transfer agent mixture of adding, and continue stirring 2 ~ 4h, regulates pH to 8 ~ 9, adds suitable deionized water, obtain the agent on crack resistance of concrete mud agent based on the design of anti-plug layer.
3. the preparation method of the agent on crack resistance of concrete mud agent based on the design of anti-plug layer according to claim 2, is characterized in that: described small molecule monomer is the vinyl-based small molecule monomer with cationic charge, and its molecular structure is as follows:
4. the preparation method of the agent on crack resistance of concrete mud agent based on the design of anti-plug layer according to claim 3, is characterized in that: the preparation method of the described vinyl-based small molecule monomer with cationic charge is as follows:
A) maleic anhydride and acetone catalyzer are uniformly mixed in encloses container, are warming up to 5 ~ 7 DEG C, and are incubated 0.5h;
B) keep temperature-resistant, evenly add dimethylethanolamine at 10min, and be incubated 8h;
C) after completion of the reaction by solution for vacuum suction filtration, clean filter cake with acetone, vacuum-drying obtains pressed powder;
D) above-mentioned pressed powder is dissolved in distilled water, regulates pH to 8 ~ 9, add sodium chloroacetate, regulate temperature to 30 ~ 35 DEG C, and be incubated 9h, obtain the vinyl-based small molecule monomer with cationic charge;
Wherein, step a), b), d) in used maleic anhydride: dimethylethanolamine: the mass ratio of sodium chloroacetate is 1:1:1, the consumption of acetone is 4 ~ 5 times of maleic anhydride quality.
5. the preparation method of agent on crack resistance of concrete mud agent based on the design of anti-plug layer according to claim 2, is characterized in that: described oxygenant is ammonium persulphate, any one or two kinds in hydrogen peroxide, Potassium Persulphate mix, and its mol ratio is 1:1.
6. the preparation method of agent on crack resistance of concrete mud agent based on the design of anti-plug layer according to claim 2, is characterized in that: described reductive agent is the Sulfothiorine of equimolar ratio, any two or three in S-WAT, L-AA mixes.
7. the preparation method of agent on crack resistance of concrete mud agent based on the design of anti-plug layer according to claim 2, is characterized in that: described chain-transfer agent is mercaptoethanol, one or both in thiohydracrylic acid mix, and during two kinds of mixing, mol ratio is 2:1.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106519121A (en) * | 2016-11-21 | 2017-03-22 | 山东交通学院 | Enhanced anti-mud agent and preparing method thereof |
| CN111302721A (en) * | 2020-03-27 | 2020-06-19 | 浙江广天构件股份有限公司 | Preparation method of concrete slurry and pattern concrete prefabricated part |
| CN116553857A (en) * | 2023-05-15 | 2023-08-08 | 山东恒丰天利新材料科技有限公司 | Small molecule anti-mud agent |
-
2015
- 2015-08-07 CN CN201510484284.0A patent/CN105016645A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 巨浩波: ""砂石含泥量对聚羧酸系减水剂性能的影响及抗泥剂的合成研究"", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106519121A (en) * | 2016-11-21 | 2017-03-22 | 山东交通学院 | Enhanced anti-mud agent and preparing method thereof |
| CN111302721A (en) * | 2020-03-27 | 2020-06-19 | 浙江广天构件股份有限公司 | Preparation method of concrete slurry and pattern concrete prefabricated part |
| CN111302721B (en) * | 2020-03-27 | 2022-04-08 | 浙江广天构件股份有限公司 | Preparation method of concrete slurry and pattern concrete prefabricated part |
| CN116553857A (en) * | 2023-05-15 | 2023-08-08 | 山东恒丰天利新材料科技有限公司 | Small molecule anti-mud agent |
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Application publication date: 20151104 |
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