Amphoteric carboxylic acid comb grafted copolymer as concrete super-plasticizing agent

A technology of graft copolymer and amphoteric carboxylic acid, which is applied in the field of concrete admixtures in building materials, can solve the problems of unsatisfactory synthesis process, poor dispersion retention ability, high admixture high-strength concrete content, etc.
CN1673163AActive Publication Date: 2005-09-28JIANGSU SOBUTE NEW MATERIALS
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
JIANGSU SOBUTE NEW MATERIALS
Publication Date
2005-09-28

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Abstract

The amphoteric carboxylic acid comb grafted copolymer as concrete super-plasticizing agent is prepared through the following steps: 1) free radical copolymerizing reaction of four kinds of monomers in certain proportion in water soluble medium; 2) crosslinking reaction through introducing crosslinking agent after the polymerization. The present invention proposes that the amphoteric ionic polymer can raise the saturated added amount of concrete super-plasticizing agent, and introduces amphoteric ion concept into the molecular design of concrete admixture. The concrete super-plasticizing agent of the present invention has high water reducing rate, can eliminate the environmental pollution caused by concrete water reducing agent and reduce the added amount while ensuring the outstanding dispersivity and slump maintaining capacity.
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Description

technical field

[0001] The invention relates to a high water-reducing superplasticizer for cement, concrete and mortar, specifically an amphoteric carboxylic acid comb-shaped graft copolymerized concrete superplasticizer, which belongs to the concrete admixture technology in building materials field. Background technique

[0002] Cement concrete is the most widely used building material in the world, but it has disadvantages such as heavy weight, low strength and brittleness. With the rapid development of the construction industry, new requirements have been put forward for various aspects of concrete, such as improving the strength of concrete and improving the slump loss of concrete during transportation. Adding admixtures, especially high-efficiency water reducers, to concrete is an effective, simple and economical method to reduce the water-binder ratio, increase concrete strength, and improve various properties of concrete. Currently used mainly include modified ligni...

Claims

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