Polycarboxylic acid high-slump-retaining zero-bleeding high-performance water reducing agent

Abstract

The invention relates to a polycarboxylic acid high-slump-retaining zero-bleeding high-performance water reducing agent. The polycarboxylic acid high-slump-retaining zero-bleeding high-performance water reducing agent comprises the following components in percentage by weight: 60.0 to 80.0 percent of polycarboxylic acid ester water reducer with solid content of 20 percent, 15.0 to 35.0 percent of polycarboxylic acid ether additive with solid content of 20 percent, 1.0 to 2.5 percent of sodium gluconate, 0.5 to 1.5 percent of sodium lignin sulfonate, 0.2 to 0.5 percent of ionic membrane caustic soda, 0.2 to 0.5 percent of isothiazolinone antiseptic and mould proof bactericide, and 1.0 to 3.0 percent of deionized water; a preparation method comprises the following steps of: performing chemical combination on the polycarboxylic acid ester additive, the polycarboxylic acid ether additive, and the deionized water in the ratio at the temperature of between 30 and 50 DEG C; keeping the temperature, and adding sodium gluconate, lignosulfonate exciting agent to form the synthetic product with a specific structure; and cooling to normal temperature, adding the ionic membrane caustic soda to regulate the pH value, and adding the isothiazolinone antiseptic and mould proof bactericide to form the final product. The polycarboxylic acid high slump retaining zero-bleeding high-performance water reducing agent has low doped content, high water reducing ratio, wide cement application range, and high slump retaining capacity, is zero-bleeding and is suitable for cement with different labels.

Description

technical field [0001] The invention relates to a polycarboxylic acid-based high-slump and zero-bleeding high-performance water reducer, which belongs to the field of new material science and is especially suitable for self-compacting concrete, high-performance concrete, ultra-high-strength concrete and the like. Background technique [0002] In recent years, with the rise of national key high-speed rail projects, the application range of polycarboxylate admixtures has become wider and wider, and the scope of engineering has gradually expanded to the field of ordinary civil buildings. The polycarboxylate admixture is obviously different from the traditional lignosulfonate, naphthalene, sulfamate, melamine and other admixtures. It has low content, high water reducing rate and good concrete dispersion effect. , No pollution to the environment and so on. However, with the expansion of the scope of use, its own inherent shortcomings are gradually exposed, especially after the p...

AI Technical Summary

Problems solved by technology

The production process is simple, pollution-free, and low energy consumption