Mud-resistant polycarboxylic acid water reducer and preparation method thereof

A technology of polycarboxylic acid and water reducing agent, applied in the field of concrete admixtures, can solve the problems of poor adaptability, no dispersibility and poor dispersibility of cement, and achieve the effects of high water reducing rate, good dispersibility and good workability

Inactive Publication Date: 2014-07-02
BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the dispersion of this cross-linked body is poor in the early stage
The overall disadvantage of this type of copolymer is that it has no dispersibility in the early stage, and its dispersibility is greatly offset after it is compounded into a high-water-reducing superplasticizer, and its adaptability to cement in different regions is also poor.

Method used

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  • Mud-resistant polycarboxylic acid water reducer and preparation method thereof
  • Mud-resistant polycarboxylic acid water reducer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Vinyl polyoxyethylene ether: sodium styrene sulfonate: acrylic acid: water: acrylamide: ammonium persulfate: mercaptoethanol: potassium hydroxide = 1.0: 0.9: 2.5: 180: 0.3: 0.2: 0.5 (all components According to mole ratio), the temperature was raised to 60°C, and a colorless viscous transparent liquid was obtained after 5 hours of polymerization.

Embodiment 2

[0026] Vinyl polyoxyethylene ether: sodium styrene sulfonate: acrylic acid: water: methylol acrylamide: hydrogen peroxide: thioglycolic acid: tetramethylethylenediamine = 1.0: 1.0: 3.0: 180: 0.15: 0.1: 0.35 (the molar ratio of each component) was fed, the temperature was raised to 65°C, and a yellow viscous transparent liquid was obtained after 5 hours of polymerization. Example 3

Embodiment 3

[0027] Vinyl polyoxyethylene ether: sodium styrene sulfonate: acrylic acid: water: acrylamidodimethylethanesulfonic acid: potassium persulfate: mercaptopropionic acid: ethanolamine = 1.0: 1.1: 3.5: 180: 0.25: 0.2: 0.4 (the molar ratio of each component) was fed, the temperature was raised to 70° C., and a yellow viscous transparent liquid was obtained after 5 hours of polymerization.

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Abstract

The invention discloses a mud-resistant polycarboxylic acid water reducer. The mud-resistant polycarboxylic acid water reducer is prepared from the following components: vinyl polyoxyethylene ether, sodium p-styrenesulfonate, an acrylic acid and acrylamide compounds as monomers as well as an alkaline neutralizer, an initiator and a molecule modulator as auxiliary materials through copolymerization. The mud-resistant polycarboxylic acid water reducer disclosed by the invention is high in water-reducing rate, small in slump loss, good in mud-resistant effect, free of formaldehyde pollution in a production process, and especially adapts to sand concrete with relatively high mud content.

Description

technical field [0001] The invention belongs to the technical field of concrete admixtures, and in particular relates to a mud-resistant polycarboxylate water reducer and a preparation method thereof. Background technique [0002] In recent years, the research and production of concrete admixtures are increasingly developing in the direction of high performance, green and pollution-free. Polycarboxylate high-efficiency water reducer is suitable for the preparation of high-strength, ultra-high-strength concrete, high fluidity and self-compacting concrete due to its high water-reducing rate, good slump retention performance, fast strength growth, and good appearance quality, and has become a concrete admixture at home and abroad. research and development hotspots. However, polycarboxylate superplasticizers are very sensitive to the mud content in aggregates in concrete. Polycarboxylate superplasticizers must face the problem of the influence of concrete aggregate mud content ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F290/06C08F212/14C08F220/06C08F220/56C04B24/16C04B103/30
Inventor 王虎群熊卫锋段文锋
Owner BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD
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