Modifier for polycarboxylate-type water reducer for concrete and preparation method of modifier

Abstract

The invention relates to a modifier for a polycarboxylate-type water reducer for concrete and a preparation method of the modifier. The modifier is prepared by polymerizing polyethylene glycol isoamyl allyl ether, itaconic anhydride, t-butyl acrylamide sulfonic acid and crotonic acid unsaturated monomers in the presence of an initiator and a molecular weight modifier in a water solution. The modifier has the advantages that the doping amount is low, the cement adaptability is good, the holding capacity of slump constant of concrete is strong, the cost is low and synthesizing process is carried out at normal temperature. The preparation method of the modifier has the beneficial effects that the process is simple, the energy is saved in a synthetic production process, and the production cost is effectively lowered.

Description

Technical field [0001] The invention relates to a concrete admixture, in particular to a regulator for concrete polycarboxylic acid water reducer and a preparation method. Background technique [0002] With the continuous advancement of my country's urbanization, construction technology has also been continuously developed, and the construction industry has higher and higher requirements for concrete technology. Traditional naphthalene series and aliphatic water reducers can no longer meet the technical requirements of modern concrete. Polycarboxylic acid superplasticizer has become the trend of admixture development due to its advantages such as low dosage, high water reduction rate, small slump loss, good compatibility with different cements and admixtures, and green products. However, with the continuous expansion of the scale of cities, natural resources such as sand and gravel are becoming more and more scarce, and the quality is uneven. In addition to the requirements of ur...

AI Technical Summary

Problems solved by technology

However, with the continuous expansion of the city scale, natural resources such as sand and gravel are becoming more and more scarce, and the quality is uneven. In addition to the city's green environmental protection requirements, the transportation distance of concrete is also getting longer and longer. The slump retention puts forward higher requirements, and the traditional polycarboxylate superplasticizer is used alone to prepare concrete with high performance, high slump retention, and ultra-long pumping.

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