Anti-mud small material for compounding of polycarboxylate superplasticizer and application method thereof

Abstract

The invention discloses an anti-mud small material for compounding of a polycarboxylate superplasticizer and an application method thereof. The anti-mud small material is prepared from the following raw materials by mass: 60 to 75% of sodium pyrosulfite, 0 to 20% of sodium hexametaphosphate, 10 to 25% of sodium tripolyphosphate and 5 to 15% of sodium nitrate. A preparation method for the anti-mud small material is to uniformly mix the above-mentioned raw materials in proportion under stirring and hermetically preserve the obtained anti-mud small material. According to the application method, the anti-mud small material is used as a compounding small material for compounding with the polycarboxylate superplasticizer, and the usage amount of the anti-mud small material is 1 to 5% of a finished polycarboxylate superplasticizer product. According to the invention, the anti-mud small material has strong clay dispersion capability and preferential clay adsorption effect, thereby greatly reducing adsorption consumption of the polycarboxylate superplasticizer by clay, guaranteeing high water-reducing effect and excellent slump loss resistance of the polycarboxylate superplasticizer and offsetting influence of the clay on concrete strength; and the preparation and application methods are simple, the usage amount of the anti-mud small material is small, and cost is low.

Description

technical field [0001] The invention relates to a concrete admixture, in particular to a mud-resistant small material for compounding a polycarboxylate water reducer, and belongs to the technical field of chemical building materials. Background technique [0002] Concrete is currently the most widely used building material. Most of the existing buildings are made of concrete. Concrete has become the basis of human life. Concrete admixture is the sixth component in concrete except cement, sand, stone, water, and mineral admixtures, and it plays a particularly important role in the application of high-performance concrete. Polycarboxylate high-performance concrete superplasticizer was first developed and applied by Japan in the mid-1980s, and industrialized production was officially realized in the mid-1990s, and it has become a new type of concrete admixture widely used in construction. Excellent properties such as high water reducing rate, high slump retention effect, and e...

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a kind of mud-resistant small material for polycarboxylate superplasticizer compound and its use method, which is used to solve the problem of poor use effect of polycarboxylate water reducer in concrete with high mud content and the current situation. There are problems such as high cost, complicated process, large dosage and affecting the durability of concrete in existing technologies.

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