Composite cementing material, concrete and mortar

Abstract

The invention discloses a composite cementing material, concrete and mortar, and relates to the technical field of building materials. The composite cementing material for common concrete comprises 52%-58% of cement, 15%-30% of mineral powder and 15%-30% of circulating fluidized bed sulfur fixing ash or comprises 62%-68% of cement, 10%-20% of flyash and 15%-25% of circulating fluidized bed sulfurfixing ash. The composite cementing material for micro-expansive concrete or mortar comprises 42%-48% of cement, 10%-25% of mineral powder and 30%-45% of circulating fluidized bed sulfur fixing ash orcomprises 52%-58% of cement, 10%-15% of flyash and 30%-35% of circulating fluidized bed sulfur fixing ash. By the composite cementing material, the compatibility and soundness of the circulating fluidized bed sulfur fixing ash and a polycarboxylic acid pumping agent can be improved.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a composite cementitious material, concrete and mortar. Background technique [0002] The comprehensive utilization of industrial waste resources is one of the important ways for my country's industry to achieve "green" economy and sustainable development. Circulating fluidized bed sulfur-fixing ash is one of the main wastes produced by thermal power plants after controlling the emission of S02. It contains certain burnt clay minerals. The chemical composition is similar to fly ash. It can be used as a blend of concrete and mortar. material. [0003] However, the high sulfur-containing minerals and residual lime in the circulating fluidized bed sulfur-fixing ash lead to poor compatibility with polycarboxylic acid pumping agents and poor volume stability when used in concrete and mortar. [0004] Therefore, there is an urgent need to find a method or material that can solve the...

AI Technical Summary

Problems solved by technology

[0005] In view of this, the embodiment of the present invention provides a composite cementitious material, concrete and mortar, the main purpose is to solve the problem of poor compatibility between circulating fluidized bed sulfur-fixing ash and polycarboxylic acid pumping agent