Water-retaining polycarboxylic acid water reducer and preparation method thereof

A technology of water reducing agent and polycarboxylic acid, which is applied in the field of concrete water reducing agent, can solve the problems of bleeding, water cannot be dispersed uniformly and stably, and achieve the effect of improved water retention performance, good catalytic effect, and not easy to sink

Active Publication Date: 2021-07-06
唐山冀东水泥外加剂有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Polycarboxylate superplasticizer is a kind of superplasticizer with high performance. However, after the polycarboxylate superplasticizer used in the market is mixed with concrete raw materials, during the process of concrete transportation, vibrating and pumping, the coarse aggregate Particles may settle, so that water cannot be uniformly and stably dispersed into the gaps between particles, resulting in bleeding phenomenon

Method used

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  • Water-retaining polycarboxylic acid water reducer and preparation method thereof
  • Water-retaining polycarboxylic acid water reducer and preparation method thereof
  • Water-retaining polycarboxylic acid water reducer and preparation method thereof

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Experimental program
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Effect test

Embodiment 1-3

[0038] According to the ratio in Table 2, the hydroxypropyl methylcellulose was added into water and stirred to dissolve, and then the mother liquor of polycarboxylate superplasticizer and hydrolyzed polymaleic anhydride were added and stirred to obtain a water-retaining polycarboxylate superplasticizer.

Embodiment 4-10

[0040] Prepare according to the ratio in Table 2: Divide the water into two equal parts, heat one part of the water to 65 ° C, add hydroxypropyl methylcellulose and stir to dissolve, then add the compounding agent in a constant temperature magnetic stirrer (model: DF -101S) Mix and stir at 100r / min for 1 hour, then let stand and cool to 30°C to prepare the mixture for later use;

[0041] Add hydrolyzed polymaleic anhydride and polycarboxylate superplasticizer mother liquor to another part of water, stir and mix evenly, then add the prepared mixture, mix and stir to obtain water-retaining polycarboxylate superplasticizer.

Embodiment 11

[0043] Prepare according to the ratio in Table 2: heat the water to 65°C, add hydroxypropyl methylcellulose and stir to dissolve, then add the compounding agent and mix under the condition of 100r / min with a constant temperature magnetic stirrer (model: DF-101S) After stirring evenly for 1 hour, let it stand and cool to 30°C to prepare a mixture for use; after stirring and mixing the mother liquor of hydrolyzed polymaleic anhydride and polycarboxylate superplasticizer, add the prepared mixture and mix and stir to prepare Water-retaining polycarboxylate superplasticizer.

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Abstract

The invention relates to the technical field of concrete water reducing agents, and particularly discloses a water-retaining polycarboxylic acid water reducer and a preparation method thereof. The water-retaining polycarboxylic acid water reducer comprises, by weight, 50 to 65 parts of a polycarboxylic acid water reducer mother liquor; 5 to 15 parts of hydroxypropyl methyl cellulose; 1 to 5 parts of hydrolytic polymaleic anhydride; and 30 to 50 parts of water. The polycarboxylic acid water reducer mother liquor is an isopentenol type polycarboxylic acid water reducer mother liquor. The preparation method comprises the following steps: correspondingly weighing the raw materials in parts by weight, adding the raw materials into water, and stirring and dissolving to obtain the water-retaining polycarboxylic acid water reducer. The water-retaining polycarboxylic acid water reducer can be used in a concrete mixture, and has the advantages that the water-retaining property of concrete is enhanced, so that the bleeding phenomenon of the concrete is reduced.

Description

technical field [0001] This application relates to the technical field of concrete water reducers, more specifically, it relates to a water-retaining polycarboxylate water reducer and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of my country's infrastructure, the amount of concrete has increased significantly, followed by rapid development of concrete additives, especially water reducing agents. Water reducing agent is a kind of more important admixture in concrete admixture, it can disperse cement particles after adding to concrete mixture, it can improve the fluidity of concrete or reduce the unit dosage of cement. [0003] Polycarboxylate superplasticizer is a kind of superplasticizer with high performance. However, after the polycarboxylate superplasticizer used in the market is mixed with concrete raw materials, during the process of concrete transportation, vibrating and pumping, the coarse aggregate Particle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38C04B103/30
CPCC04B40/0039C04B2103/302C04B24/24C04B24/383C04B24/2664C04B24/32C04B24/026C04B24/128
Inventor 郭自刚任建波赵百顺陈志明郑立曼张露瑶王守兴张伟利苏晓强刘利光王建朋陈凤琪毛泽南高峰王洋
Owner 唐山冀东水泥外加剂有限责任公司
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