A kind of early-strength polycarboxylate water reducer and its preparation method and application

A technology of polycarboxylic acid and water reducing agent, which is applied in the field of concrete admixture, can solve the problems affecting concrete strength and complex preparation process, and achieve the effects of improving slump and plasticity, high strength, and improving water reducing performance

Active Publication Date: 2021-11-02
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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  • A kind of early-strength polycarboxylate water reducer and its preparation method and application
  • A kind of early-strength polycarboxylate water reducer and its preparation method and application
  • A kind of early-strength polycarboxylate water reducer and its preparation method and application

Examples

Experimental program
Comparison scheme
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 water reducer as well as its preparation method and application. Early-strength polycarboxylate superplasticizer includes the following components: polycarboxylate high-efficiency water-reducer mother liquor, early-strength components, defoamers, accelerators, fluorosilicates; the early-strength components include organic early-strength components The strong component and the inorganic early-strength component, the mass ratio of the organic early-strength component and the inorganic early-strength component is 1: (0.8-1.2); the polycarboxylate high-efficiency water reducer mother liquor includes the following raw materials in parts by weight: 20-45 parts of methoxypolyethylene glycol, 15-20 parts of 1,2,4,5-pyrellitic anhydride, 5-14 parts of sodium methacrylate sulfonate, 15-20 parts of p-toluenesulfonic acid, 35 ‑40 parts of ionized water, 1‑5 parts of polymerization inhibitor, 2.5‑5 parts of initiator, 1‑3 parts of pH regulator. The early-strength polycarboxylate water-reducer of the invention has the advantages of being able to increase the early strength of concrete without affecting the later strength of concrete and improving the frost resistance of concrete.

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 Patents(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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