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Anti-sludge concrete water reducer and preparation method thereof

A technology of concrete water reducer and anti-mud type, applied in the field of building materials, can solve the problems of high material requirements, high cost, unsuitable cost performance, etc., and achieve the effect of simple production process, less environmental pollution and high strength

Active Publication Date: 2014-05-07
大连市铭源全科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Judging from the current market situation, the third-generation water reducer has excellent performance, but due to its high material requirements and high cost, it is difficult to promote it in the market
At the same time, when preparing low-grade strength concrete, the quality of sand and gravel is poor, such as high mud content in sand and gravel, which increases the amount of polycarboxylate superplasticizer, and the cost performance is not suitable

Method used

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  • Anti-sludge concrete water reducer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Add 100 mol of methacryl alcohol polyoxyethylene ether with a molecular weight of 2000, 20 mol of acryloyloxyethyl trimethyl ammonium chloride and 50 mol of sodium methacrylsulfonate into the reaction kettle, dissolve and stir to mix evenly, and heat up to 55°C, then dropwise add a 30% acrylic acid solution made of 300mol acrylic acid and a 20% ammonium persulfate solution made of 0.27kg ammonium persulfate into the reaction kettle, dropwise within 3.5h After completion, continue to stir the mixture in the reactor for 1 hour, neutralize the reactant with liquid caustic soda until the pH value is 6, and prepare the anti-mud concrete superplasticizer.

Embodiment 2

[0021] Add 100 mol of methacryl alcohol polyoxyethylene ether with a molecular weight of 2400, 50 mol of acryloyloxyethyltrimethylammonium chloride and 50 mol of sodium methacrylsulfonate into the reaction kettle, dissolve and stir to mix evenly, and heat up to 60°C, and then dropwise add a 40 wt% acrylic acid solution made of 400mol methacrylic acid and a 40 wt% potassium persulfate solution made of 0.65kg potassium persulfate to the reactor, in 4.5h After the internal dropwise addition is completed, continue to stir the mixture in the reactor for 1.5 hours, neutralize the reactant with liquid caustic soda until the pH value is 7, and prepare the anti-mud concrete superplasticizer.

Embodiment 3

[0023] Add 100 mol of methacryl alcohol polyoxyethylene ether, 30 mol of acryloyloxyethyltrimethylammonium chloride and 50 mol of sodium methacryl sulfonate into the reaction kettle, dissolve and mix evenly, and heat up to 60°C. Then dropwise add the acrylic acid solution of 35 wt % by 350 mol of acrylic acid concentration and the sodium persulfate solution of 30 wt % made by 0.38 kg of sodium persulfate, dropwise within 4.0 h, and then Continue to stir the mixture in the reactor for 2 hours, neutralize the reactant with liquid caustic soda until the pH value is 6.5, and prepare the anti-mud concrete superplasticizer.

[0024] Comparing the concrete water reducer prepared in the above examples with the ordinary polycarboxylate water reducer, the river sand with a mud content of 7.8% was selected, and the results of the comparison test are as follows:

[0025]

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Abstract

The invention discloses an anti-sludge concrete water reducer and a preparation method thereof. Particularly, the water reducer provided by the invention is prepared by the following processes: adding the raw materials, namely metallyl alcohol polyoxyethylene ether, acryloyloxyethyl trimethyl ammonium chloride and sodium methallyl sulfonate to a reaction kettle according to a certain proportion, heating up after evenly stirring and mixing; then dripping the prepared crylic acid solution and initiator to the reaction kettle; neutralizing a reactant by using caustic soda liquid until the pH value is 6-7 after reaction is finished; finally, preparing the water reducer. The water reducer provided by the invention is good in performance, and strong in mud resistance, and meanwhile, the anti-sludge concrete water reducer is simple in technology, less in pollution, low in cost, and high in cost performance.

Description

technical field [0001] The invention belongs to the field of building materials, and relates to a concrete additive, in particular to a mud-resistant water reducer and a preparation method thereof. Background technique [0002] Water reducing agent refers to the admixture that can reduce the mixing water consumption and increase the strength of concrete under the condition of constant workability and cement dosage of concrete; or save the dosage of cement under the condition of constant workability and strength; After mixing, due to the molecular attraction of cement particles, the cement slurry forms a flocculation structure, so that 10% to 30% of the mixing water is wrapped in the cement particles, and cannot participate in free flow and lubrication, thus affecting concrete mixing. The fluidity of the material, when the water reducing agent is added, because the molecules of the water reducing agent can be directionally adsorbed on the surface of the cement particles, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/34C08F220/06C08F228/02C04B24/16C04B103/30
Inventor 宫振鑫
Owner 大连市铭源全科技开发有限公司
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