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Self-curing polycarboxylic type water reducer and preparation method thereof

A technology of protecting polycarboxylic acid and water reducing agent, which is applied in the field of concrete additives, can solve problems such as self-curing functional polycarboxylic acid not involved, and achieve the effects of good comprehensive performance, reduced operating strength and guaranteed quality.

Active Publication Date: 2017-08-18
山东华伟银凯建材科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In the prior art, polycarboxylate superplasticizers with corresponding functions can be synthesized by selecting monomers with different functional groups, but none of them involve polycarboxylate superplasticizers with self-curing functions.

Method used

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  • Self-curing polycarboxylic type water reducer and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The molecular weight of TPEG is 1200, and the molar ratio of macromonomer TPEG: small monomer ACAM and AA: regulating monomer BMZ: grafting monomer QYN: crosslinking agent RJZ is 1:3.5:0.2:0.1:0.05, of which ACAM:AA The molar ratio is 1:5, the chain transfer agent is mercaptoacetic acid, and its consumption is 0.1% of the total mass of polyether macromonomer, small monomer, adjustment monomer and graft monomer, and the initiator is potassium persulfate, and its consumption It is 0.5% of the total mass of polyether macromonomer, small monomer, regulating monomer and grafting monomer, and is prepared as a 3.0% aqueous solution.

[0037] Add QYN to the reaction bottle, and add deionized water to make a bottom solution with a concentration of 5%, turn on the stirring, and raise the temperature to 60°C. TPEG plus deionized water is made into 50% solution A, AA, ACAM, BMZ, RJZ, chain transfer agent and deionized water are made into 30% solution B, and initiator potassium pers...

Embodiment 2

[0039]The molecular weight of HPEG is 2400, the molar ratio of macromonomer HPEG: small monomer ACAM and AA: regulating monomer BMZ: grafting monomer QYN: crosslinking agent RJZ is 1:5:0.3:0.1:0.08, of which ACAM:AA The molar ratio is 1:4, the chain transfer agent is mercaptoacetic acid, and its consumption is 0.5% of the total mass of polyether macromonomer, small monomer, adjustment monomer and graft monomer, and the initiator is potassium persulfate, and its consumption It is 0.6% of the total mass of polyether macromonomer, small monomer, regulating monomer and grafting monomer, and is prepared as a 3.0% aqueous solution.

[0040] Add QYN to the reaction bottle, and add deionized water to make a bottom solution with a concentration of 6%, turn on the stirring, and raise the temperature to 70°C. Add TPEG and deionized water to make 30% solution A, AA, ACAM, BMZ, RJZ, chain transfer agent and deionized water to make 30% solution B and initiator potassium persulfate solution ...

Embodiment 3

[0042] The molecular weight of HPEG is 3000, the molar ratio of macromonomer HPEG: small monomer ACAM and AA: regulating monomer BMZ: grafting monomer QYN: crosslinking agent RJZ is 1:4:0.4:0.1:0.1, of which ACAM:AA The molar ratio is 1:4, the chain transfer agent is mercaptopropionic acid, and its consumption is 0.2% of the total mass of polyether macromonomer, small monomer, adjustment monomer and graft monomer, and the initiator is ammonium persulfate. The dosage is 1.0% of the total mass of polyether macromonomer, small monomer, regulating monomer and grafting monomer, and it is formulated into a 5.0% aqueous solution.

[0043] Add QYN to the reaction bottle, and add deionized water to make a bottom solution with a concentration of 7%, turn on the stirring, and raise the temperature to 60°C. Add TPEG and deionized water to make 40% solution A, AA, ACAM, BMZ, RJZ, chain transfer agent and deionized water to make 35% solution B and initiator ammonium persulfate solution C, a...

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Abstract

The invention belongs to the technical field of concrete additives and particularly relates to a self-curing polycarboxylic type water reducer and a preparation method thereof. The self-curing polycarboxylic type water reducer is prepared from a polyether macromonomer, a polyether micromonomer, a regulation monomer-methyl ricinoleate, a grafting monomer-sodium hydroxyethyl methyl cellulose, a cross-linking agent-ethylene glycol dimethacrylate, a chain transfer agent, an initiator and deionized water. The self-curing polycarboxylic type water reducer has the advantages that after the sodium hydroxyethyl methyl cellulose is introduced into a molecular structure and the cross-linking agent-the ethylene glycol dimethacrylate is used for proper cross-linking, the self-curing polycarboxylic type water reducer can achieve solvent swelling and is capable of retaining internal water required by cement hydration, thereby having a self-curing function.

Description

technical field [0001] The invention belongs to the technical field of concrete additives, in particular to a self-curing polycarboxylate water reducer and a preparation method thereof. Background technique [0002] As a kind of artificial stone, concrete is widely used because of its pourability, convenient on-site production, and good economy. It has become the foundation of modern society. High-strength concrete is a direction of concrete development, and its preparation is characterized by low water-binder ratio. After the hydration reaction between cement and water, the concrete will shrink by itself due to the reduction of moisture, and the shrinkage and deformation of general concrete are limited, and tensile stress will be generated inside it, which will cause cracks in the concrete and reduce the durability of the concrete. . Therefore, certain maintenance measures must be taken to control water evaporation and promote the maximum hydration of cement. Curing has ...

Claims

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Application Information

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IPC IPC(8): C08F291/08C08F291/06C08F220/06C08F220/56C04B24/26C04B103/30
CPCC04B24/2694C04B2103/0059C04B2103/302C08F251/02C08F283/065C08F220/06
Inventor 张明韩芳芳陈凌燕梁飞张森贾吉堂
Owner 山东华伟银凯建材科技股份有限公司
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