Large adulteration quantity fly ash gel material for building mortar and preparation method thereof

Abstract

A highly-contented fly ash cementitious material for building mortar and manufacturing method thereof is obtained through high-speed stirring and mixing of raw materials at a rate by weight percent of: 55 percent-80 percent of fly ash, 5 percent-35 percent of cement, 2 percent-10 percent of siliceous dust, 0.5 percent-8 percent of alkali metal sulfate and 1 percent-5 percent of alkali metal silicate. The invention can increase considerably the mixing proportion of fly ash in cementitious material, improve the construction performance and flexural strength of cementitious material, reduce the flexural rate of cementitious material and reduce water consumption for standard consistency; also the invention has advantages of low manufacturing cost and simple process, which can serve as protective mortar such as anti-cracking mortar for the coating of the thermal insulation layer, improve flexural strength of anti-cracking mortar; reduce flexural rate and elastic module, and improve the anti-cracking performance of mortar.

Description

(1) Technical field [0001] The invention relates to a large-volume fly ash cementitious material used for building mortar and a preparation method thereof. (2) Background technology [0002] Fly ash is a solid waste discharged from thermal power plants. The current application of fly ash is directly or mechanically ground, and then mixed into lime or cement as a building gelling material. In the traditional technology, when fly ash is used as raw material to produce cementitious materials, the amount of fly ash is usually below 40%, and when the amount of fly ash is above 40%, the strength of the obtained cementitious material is low , can not meet the construction needs. Usually the cementitious materials used in construction mortar materials are mainly cement or fly ash, lime, and activators are added to the cement. The problem is that the amount of fly ash added is small, and the folding ratio of the material is high, so a large amount of expensive cement is required. P...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a large amount of fly ash cementitious material used in building mortar and its preparation method, to solve the problem that the cementitious material is used in building mortar with a low amount of fly ash and the cost needs to be further reduced and solve the technical problems of low early strength, low flexural strength, high compressive ratio of mortar and poor crack resistance when fly ash cementitious material is used in building mortar