Early-strength polycarboxylate superplasticizer, and preparation method and application thereof

A technology of polycarboxylic acid and water reducing agent, applied in the field of concrete admixtures, can solve the problems of affecting the strength of concrete, complicated preparation process, etc., and achieve the effects of improving slump and plasticity, high strength, and improving early strength

Active Publication Date: 2019-11-15
重庆腾治科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The preparation process of the existing early-strength polycarboxylate superplasticizer with slump-preserving function is complicated, and at the same time affects the later strength of concrete

Method used

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  • Early-strength polycarboxylate superplasticizer, and preparation method and application thereof
  • Early-strength polycarboxylate superplasticizer, and preparation method and application thereof
  • Early-strength polycarboxylate superplasticizer, and preparation method and application thereof

Examples

Experimental program
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Effect test

preparation example 1-3

[0046] In preparation example 1-3, the rosin resin is selected from the rosin resin whose article number is 422 sold by Jiangxi Jason Resin Co., Ltd., and the sodium gluconate is selected from the sodium gluconate whose article number is 002 sold by Jinan Xinlei Chemical Technology Co., Ltd., lignin sulfonate Calcium acid is selected from the calcium lignosulfonate model MG-3 sold by Shanghai Yunzhe New Material Technology Co., Ltd.

preparation example 1

[0047] Preparation Example 1: Add 7kg of sodium hydroxide to 20kg of water, heat up to 80°C, add 7.5kg of rosin resin under stirring, react for 2 hours, and dilute with hot water at 40°C until it is clear and transparent, without turbidity and precipitation After confirming that the reaction is complete, add 8.5kg sodium gluconate, 4.8kg diethanolamine, 3.2kg concentration of 4% polyvinyl alcohol solution and 3kg calcium lignosulfonate in turn, and stir and mix evenly.

preparation example 2

[0048] Preparation Example 2: Add 11kg of sodium hydroxide to 28kg of water, heat up to 85°C, add 12.5kg of rosin resin under stirring, react for 2.5h, dilute with 50°C hot water until clear, transparent, free of turbidity, Precipitate, after confirming that the reaction is complete, add 12kg sodium gluconate, 5.5kg diethanolamine, 4.4kg polyvinyl alcohol solution with a concentration of 4% and 5kg calcium lignosulfonate in sequence, and stir and mix evenly.

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Abstract

The invention discloses an early-strength polycarboxylate superplasticizer, and a preparation method and application thereof. The early-strength polycarboxylate superplasticizer comprises the following components: polycarboxylate superplasticizer mother liquor, early-strength components, a defoaming agent, an accelerator and a fluosilicate; the early strength components comprise an organic early strength component and an inorganic early strength component, and the mass ratio of the organic early strength component to the inorganic early strength component is 1:(0.8-1.2); and the polycarboxylate superplasticizer mother liquor comprises the following raw materials in parts by weight: 20 to 45 parts of methoxy polyethylene glycol, 15 to 20 parts of pyromellitic dianhydride, 5 to 14 parts of sodium methacrylate sulfonate, 15 to 20 parts of p-toluenesulfonic acid, 35 to 40 parts of deionized water, 1 to 5 parts of a polymerization inhibitor, 2.5 to 5 parts of an initiator and 1 to 3 parts of a pH regulator. The early-strength polycarboxylate superplasticizer has the advantages that the early strength of concrete can be improved, later strength of the concrete is not affected, and frostresistance of the concrete is improved.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures, more specifically, it relates to an early-strength polycarboxylate water reducer and its preparation method and application. Background technique [0002] Concrete is the most widely used artificial building material in the world today. Concrete admixture is a substance that is added to improve the performance of concrete before or during the mixing process of concrete. It can effectively improve the performance of concrete and become an indispensable material in concrete. [0003] Polycarboxylate high-performance water reducer has the advantages of good dispersibility, high water reducing rate, low dosage, strong slump retention, low shrinkage, no "three wastes" in the production process, and environmental protection. widespread attention of the people. [0004] In the prior art, the normal temperature synthesis method of a polycarboxylic acid type high slump water reducer in the C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/16C04B24/34C08G65/331C08F283/06C08F220/38
CPCC04B24/166C04B40/0039C04B2103/302C08F283/06C08G65/3315C04B2103/50C04B2103/12C04B22/126C04B24/122C04B24/04C04B22/085C04B14/28C04B22/08C04B24/124C04B24/045C04B24/121C04B24/06C04B2103/304C04B22/062C04B24/34C04B24/10C04B24/2623C04B24/18C08F220/38
Inventor 王小清孙治平
Owner 重庆腾治科技有限公司
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