Chlorine-free rust-proof concrete early strength water-reducing agent and preparation method thereof

Abstract

The invention discloses a chlorine-free rust-proof concrete early strength water-reducing agent and a preparation method thereof. The chlorine-free rust-proof concrete early strength water-reducing agent is made from, by weight, 12-18 parts of sulfonated melamine formaldehyde resin, 10-15 parts of sulfanilate, sulfonated acetone and formaldehyde condensate, 8-12 parts of starch and acrylic acid grafted copolymer, 4-8 parts of calcium butyrate, 6-9 parts of anhydrous sodium sulfate, 4-8 parts of magnesium chromate, 10-15 parts of poly(4-styrenesulfonic acid-co-maleic acid) sodium salt, 7-11 parts of Pulullan, 3-6 parts of urea, and 5-7 parts of sodium polyacrylate. The calcium butyrate, anhydrous sodium sulfate, Pulullan, urea and sodium polyacrylate replace chloride early strength agents to be used with the water-reducing agents such as sulfonated melamine formaldehyde resin, sulfanilate, sulfonated acetone and formaldehyde condensate, and poly(4-styrenesulfonic acid-co-maleic acid) sodium salt, and the water-reducing agent has high water-reducing rate and good early strength effect, is free of chlorine ions, is rust-free for reinforcement and is good in anti-cracking effect.

Description

technical field [0001] The invention relates to a chlorine-free antirust concrete early-strength water reducer and a preparation method thereof, belonging to the technical field of concrete admixtures. Background technique [0002] Concrete has become the most commonly used building material in today's society, and concrete water reducer is one of the commonly used admixtures for concrete. It can greatly reduce the water consumption of concrete mixing under the condition of keeping the slump basically the same. It always has good workability during transportation and construction. With the development of concrete science and the improvement of engineering requirements, the performance requirements of concrete water reducers are getting higher and higher. At present, the traditional concrete water reducers mainly include lignosulfonate, melamine and naphthalenesulfonate formaldehyde condensate. , These water reducers are generally mixed with chloride salt early strength agen...

AI Technical Summary

Problems solved by technology

However, the addition of chloride salts makes the Cl in concrete － Increased concentration will easily corrode the steel bars in the concrete and lead to cracking of the concrete, which cannot meet the requirements of high-performance concrete

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