Efficient water reducing agent for improving frost resistance and dispersibility of concrete

Abstract

The invention discloses an efficient water reducing agent for improving the frost resistance and the dispersibility of concrete. The efficient water reducing agent comprises, by weight, 240-250 parts of methyl-2-buten polyoxyethylene ether, 25.2-26.0 parts of acrylic acid, 1.6-1.65 parts of ammonium persulfate, 0.53-0.55 part of thioglycolic acid, 13-14 parts of lignin, an appropriate quantity of sodium hydroxide solution with the concentration of 10 wt%, an appropriate quantity of deionized water, 26-28 parts of graphene oxide, 0.8-1 part of sodium pyrithione, 6-8 parts of waste carbon fiber yarns, 3-4 parts of methyl celluloses, 2-3 parts of ethylene glycol, 9-11 parts of porous calcium phosphate, 1.2-1.5 parts of sodium abietate and 1-1.3 parts of sodium dodecyl sulfate. The efficient water reducing agent has the advantages that carbon fibers are added into a water reducing agent under the effects of dispersing agents during preparation and are matched with added components such as the ethylene glycol and the sodium abietate, and accordingly the strength, the dispersibility, the frost resistance and the corrosion resistance of the concrete can be improved.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures, in particular to a high-efficiency water reducer for improving the dispersibility of concrete frost resistance. Background technique [0002] Polycarboxylate high-performance water-reducing agent is an important component material for preparing high-performance concrete. It is widely used in high-speed railways, bridges, Nuclear power, hydropower and other key projects. However, the performance of the mother liquor of polycarboxylate high-performance water reducer is relatively single, which cannot meet the needs of concrete in different engineering fields and different performance requirements, which greatly restricts the wide application and development of polycarboxylate high-performance water reducer. Experts and scholars at home and abroad have conducted systematic research on polycarboxylic acid-based high-performance water reducers through chemical and physical modification me...

AI Technical Summary

Problems solved by technology

However, problems such as bleeding, segregation, low strength, and cracks are prone to occur during the production of concrete, which affects the use of water reducing agents. These shortcomings are not explained in the article, and further modification is required.