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High-performance compound polycarboxylate superplasticizer

A technology of polycarboxylate and water reducer, which is applied in the field of compound water reducer and high performance compound polycarboxylate water reducer, which can solve the problem of poor cement adaptability, insufficient slump retention performance, and easy bleeding and other problems, to achieve the effect of improving the retention effect, good plastic retention effect, and improving the quality of construction projects

Active Publication Date: 2018-03-23
河北合众建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the expansion of the application of polycarboxylate superplasticizers, some problems have gradually emerged, such as: the adaptability to some special cements is not strong, and the concrete with high mud content and stone powder content is prone to slump. Insufficient performance, prone to bleeding, especially in medium and low grade concrete, poor workability

Method used

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  • High-performance compound polycarboxylate superplasticizer
  • High-performance compound polycarboxylate superplasticizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A high-performance composite polycarboxylate water-reducer, comprising, in parts by weight, 10 parts of polycarboxylate water-reducer, 1 part of methacrylate, 2 parts of tertiary carbonate, and 0.2 parts of N-acyl sarcosine , 2 parts of hydroxypropyl starch ether, 1 part of glycerin, 1 part of sodium dodecylbenzenesulfonate, and 15 parts of water.

[0030] The polycarboxylate water-reducer uses 2-methallyl polyoxyethylene ether, hydroxyethyl acrylate and sodium acrylate sulfonate in a molar ratio of 1:2.5:0.5 as monomers, and uses hydrogen peroxide, sodium persulfate, glucose Initiated by compounding with sodium thiosulfate, under the condition of 30-40 ℃, the polycarboxylate water reducer is synthesized by the free radical polymerization method in aqueous solution. The polycarboxylate water reducer is synthesized at low temperature, and the energy consumption is reduced and the production cost is saved through the compounding of monomers and compounding initiators. Th...

Embodiment 2

[0033] A high-performance composite polycarboxylate water reducer, including, by weight, 20 parts of polycarboxylate water reducer, 4 parts of methacrylate, 3 parts of tertiary carbonate, and 0.3 parts of N-acyl sarcosine , 4 parts of hydroxypropyl starch ether, 3 parts of glycerin, 3 parts of sodium dodecylbenzenesulfonate, 25 parts of water, and 1 part of treated animal hair.

[0034] The polycarboxylate water-reducer takes 2-methallyl polyoxyethylene ether, hydroxyethyl acrylate and sodium acrylate sulfonate as monomers in a molar ratio of 1:3.5:0.6, and uses hydrogen peroxide, sodium persulfate, glucose Initiated by compounding with sodium thiosulfate, polycarboxylate superplasticizer was synthesized by aqueous radical polymerization at 35°C.

[0035] The consumption of hydrogen peroxide is 1.4% of the quality of 2-methallyl polyoxyethylene ether, the consumption of sodium persulfate is 0.8% of the quality of 2-methallyl polyoxyethylene ether, and the glucose is 2-methally...

Embodiment 3

[0037] A high-performance composite polycarboxylate water-reducer, comprising, in parts by weight, 15 parts of polycarboxylate water-reducer, 2 parts of methacrylate, 2.5 parts of tertiary carbonate, and 0.2 part of N-acyl sarcosine , 3 parts of hydroxypropyl starch ether, 2 parts of glycerin, 2 parts of sodium dodecylbenzenesulfonate, 20 parts of water, 2 parts of treated animal hair.

[0038]The polycarboxylate water-reducer takes 2-methallyl polyoxyethylene ether, hydroxyethyl acrylate and sodium acrylate sulfonate as monomers with a molar ratio of 1:2.5:0.4, and uses hydrogen peroxide, sodium persulfate, glucose Initiated by compounding with sodium thiosulfate, polycarboxylate superplasticizer was synthesized by aqueous radical polymerization at 36°C.

[0039] The consumption of hydrogen peroxide is 1.6% of the quality of 2-methallyl polyoxyethylene ether, the consumption of sodium persulfate is 0.8% of the quality of 2-methallyl polyoxyethylene ether, and the glucose is 2...

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Abstract

The invention provides a high-performance compound polycarboxylate superplasticizer and belongs to the technical field of superplasticizers. The high-performance compound polycarboxylate superplasticizer is prepared from components in parts by weight as follows: 10-20 parts of a polycarboxylate superplasticizer, 1-4 parts of methacrylate, 2-3 parts of tertiary carbonic ester, 0.2-0.3 parts of N-oleoylsarcosine, 2-4 parts of hydroxypropyl starch ether, 1-3 parts of glycerin, 1-3 parts of sodium dodecyl benzene sulfonate and 15-25 parts of water. The high-performance compound polycarboxylate superplasticizer is a compound superplasticizer and has excellent water reducing performance, slump loss resistant property, dispersity and workability.

Description

technical field [0001] The invention belongs to the technical field of water reducers, and relates to a high-performance compound polycarboxylate water reducer, which is a compound type water reducer and has excellent water reducing properties, slump retention, dispersibility and workability. Background technique [0002] With the development of concrete technology, high-performance water reducer has become one of the indispensable components in the process of concrete use. Since the 1980s, polycarboxylate-based water-reducing agents have gained popularity due to their advantages such as low dosage, high water-reducing rate, good slump retention, various beneficial properties for concrete materials, strong molecular design, and environmental protection. It has become the hotspot and direction of the development of water reducing agent technology in recent years. [0003] Polyether polycarboxylate water reducer has high water reducing rate and slump retention ability, and it...

Claims

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Application Information

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IPC IPC(8): C04B24/38C04B24/16C08F283/06C04B103/30
CPCC04B24/165C04B40/0039C04B2103/302C08F283/065C04B24/045C04B24/123C04B24/38C04B24/02C04B24/20C04B22/002C04B24/14
Inventor 拜秀玲邱汉吴建忠张杰君
Owner 河北合众建材有限公司
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