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Silicon-containing graphene oxide magnetic polycarboxylate superplasticizer containing allyl alcohol polyoxyethylene ether

A technology of polyoxyethylene ether and water reducing agent, which is applied in the field of building materials, can solve the problems of incompatibility between polycarboxylate water reducing agent and concrete, easy bleeding of fresh concrete, rapid collapse and other problems, and achieve product Remarkable effect, improved slurry fluidity and retention, simple and feasible process

Active Publication Date: 2020-11-24
西安市质量与标准化研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in recent years, the quality problems of cement, mineral admixtures, coarse aggregates, and fine aggregates have been serious. In addition, there are many types of cement in my country and various engineering mix ratios, which often cause polycarboxylate superplasticizers and concrete. Correspondingly, fresh concrete is prone to problems such as bleeding, segregation, and rapid collapse

Method used

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  • Silicon-containing graphene oxide magnetic polycarboxylate superplasticizer containing allyl alcohol polyoxyethylene ether
  • Silicon-containing graphene oxide magnetic polycarboxylate superplasticizer containing allyl alcohol polyoxyethylene ether
  • Silicon-containing graphene oxide magnetic polycarboxylate superplasticizer containing allyl alcohol polyoxyethylene ether

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Add polyoxyethylene ether A, polyoxyethylene ether B and deionized water into the reaction kettle, heat and dissolve at 20-80°C to obtain A solution; add ammonium persulfate deionized solution dropwise to A solution at the same time Aqueous solution and deionized water mixed solution of acrylic acid, silane C, and mercaptopropionic acid were added dropwise at 60°C for 3.0h, and after the dripping was completed, kept at 60°C for 1.0h, and cooled to room temperature after the reaction to obtain solution B; Then add liquid caustic soda with a mass fraction of 30% to the solution B to adjust the pH value to 6-8 to obtain a polycarboxylate superplasticizer.

[0041] The structure of polyoxyethylene ether A is:

[0042] Where n=35, polyoxyethylene ether B is allyl alcohol polyoxyethylene ether, and the number of repeating units is 200;

[0043] The consumption of each component is:

[0044] Polyoxyethylene ether A15 parts

[0045] Polyoxyethylene ether B15 parts

[0046...

Embodiment 2

[0052] Others are the same as in Example 1, except that n=20 of polyoxyethylene ether A.

Embodiment 3

[0054] Others are the same as in Example 1, except that n=50 of polyoxyethylene ether A.

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Abstract

The invention belongs to the technical field of building materials and specifically relates to a silicon-containing magnetic water reducing agent containing allyl alcohol polyoxyethylene ether. The silicon-containing magnetic water reducing agent containing allyl alcohol polyoxyethylene ether is prepared by taking polyoxyethylene ether A, polyoxyethylene ether B, acrylic acid and silane C of a compound containing graphene oxide and magnetic particles as polymerization monomers, and adding an initiator, namely ammonium persulfate, a chain transfer agent, namely mercaptoacetic acid and water. The invention also discloses a preparation method of the water reducing agent. The application of the water reducing agent in the invention can significantly improve the fluidity and retentivity of slurry and the compressive strength of concrete.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to a silicon-containing magnetic polycarboxylate water reducer containing allyl alcohol polyoxyethylene ether. Background technique [0002] Water reducer is an essential chemical admixture to improve slag-based cementitious materials and concrete products. It can significantly improve the workability, compactness, strength and durability of products at a low water-cement ratio. comprehensive performance. [0003] Polycarboxylate superplasticizer, as the third generation of superplasticizer, has strong designability in molecular structure and great potential for high performance. It can prepare multifunctional products by selecting monomers with different functions for copolymerization. However, in recent years, the quality problems of cement, mineral admixtures, coarse aggregates, and fine aggregates have been serious. In addition, there are many types of cement in my c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/42C08F283/06C08F220/06C04B103/30
CPCC04B40/0039C08F283/065C04B2103/302C08F220/06C04B24/32C04B22/14C04B24/04C04B24/42C04B24/16C04B14/022C04B14/308
Inventor 雷震王迁李少岩郑宇
Owner 西安市质量与标准化研究院
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