Set retarding superplasticizer making use of flue gas desulfurization ash

Abstract

The invention discloses a set retarding superplasticizer making use of flue gas desulfurization ash. The set retarding superplasticizer is prepared from, by weight, 240-250 parts of TPEG, 25.2-26.0 parts of acrylic acid, 1.6-1.65 parts of ammonium persulfate, 0.53-0.55 part of mercaptoacetic acid, 13-14 parts of lignin, appropriate amount of sodium hydroxide solution with concentration being 10wt%, appropriate amount of deionized water, 26-28 parts of graphene oxide, 1.5-2 parts of texanol, 3-4 parts of dispersible adhesive powder, 0.9-1.2 parts of sodium hydroxide, 1.3-1.5 parts of sodium sulfate, 2-3 parts of triethanolamine, 7-8 parts of converter steel slag, 9-11 parts of flue gas desulfurization ash and 4-5 parts of sodium alginate. The set retarding superplasticizer has an excellent set retarding function and is capable of enhancing early strength of concrete, solid wastes are reduced, cement content is decreased, and land occupation of the solid wastes and pollutant generation in cement production are reduced simultaneously.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures, in particular to a slow-setting high-efficiency water reducer using flue gas desulfurization ash. 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 methods, and hav...

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.