Anti-collapse mud-resistant polycarboxylic acid and preparation method thereof

Abstract

The invention provides anti-collapse mud-resistant polycarboxylic acid and a preparation method thereof. The anti-collapse mud-resistant polycarboxylic acid is prepared from the following raw materialingredients in parts by weight: 250.0 to 300.0 parts of macromonomers, 5.0 to 10.0 parts of acrylic acid, 10.0 to 20.0 parts of hydroxypropyl acrylate, 7.5 to 15.0 parts of dimethyl diallyl ammoniumchloride, 1.0 to 1.5 parts of sodium hydrogen sulfite, 3.0 to 4.0 parts of mercaptopropionic acid, 4.0 to 7.0 parts of initiators, 400.0 to 500.0 parts of pure water, 10.0 to 20.0 parts of 30 percentsodium hydroxide, 10.0 to 20.0 parts of flue gas desulfurization gypsum, 5.0 to 10.0 parts of air entraining agents and 10.0 to 15.0 parts of water reducing agents. The anti-collapse mud-resistant polycarboxylic acid and the preparation method thereof have the beneficial effects that heating is not needed in a whole process; energy is saved; environment is protected; higher primary stage water reducing rate and better anti-collapse capability are realized; relatively strong cement particle dispersion maintaining capability is realized, so that concrete has the advantages of low doping quantity, high water reducing rate, good enhancing effect, strong durability and relatively good cement dispersibility; the setting time and gas content of the concrete are not influenced; the flowability andthe plasticity of the concrete can be improved; and the bleeding and separation of the concrete are reduced.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to a slump-preserving and mud-resistant polycarboxylic acid and a preparation method thereof. Background technique [0002] With the vigorous development of my country's infrastructure construction, the performance of all aspects of concrete necessary for infrastructure construction is also constantly improving. At the same time, the requirements for concrete slump-retaining agents are also getting higher and higher. Polycarboxylic acid-based slump-retaining agents are The third-generation high-performance slump-retaining agent has the characteristics of low dosage, high water-reducing rate, small slump loss, and good adaptability to cement. Poor slump protection ability, the preparation process and the use of raw materials cannot meet the requirements of energy conservation and environmental protection, and the ability to maintain the dispersion of cement particles is insufficient, ...

AI Technical Summary

Problems solved by technology

[0002] With the vigorous development of my country's infrastructure construction, the performance of all aspects of concrete necessary for infrastructure construction is also constantly improving. At the same time, the requirements for concrete slump-retaining agents are also getting higher and higher. Polycarboxylic acid-based slump-retaining agents are The third-generation high-performance slump-retaining agent has the characteristics of low dosage, high water-reducing rate, small slump loss, and good adaptability to cement. Poor slump protection ability, the preparation process and the use of raw materials cannot meet the requirements of energy conservation and environmental protection, and the ability to maintain the dispersion of cement particles is insufficient, so that the concrete has high content, low water reduction rate, poor reinforcement effect, and insufficient durability. The disadvantages of poor cement dispersibility and low water-reducing rate also directly affect the setting time and air content of concrete, greatly reducing the fluidity and plasticity of concrete, and increasing the bleeding and segregation of concrete, so it can solve such problems. It is imperative to realize the anti-slump and mud-resistant polycarboxylic acid and its preparation method