High-strength fly ash cement

Abstract

A high-strength fly ash cement is prepared from, by weight, 35-42% of fly ash, 10-15% of iron ore slag, 38-46% of cement clinker, 3-5% of yellow sand, 3-5% of gypsum and 0.5-1% of an activator, wherein the activator is obtained by mixing 10-30 parts of alunite, 15-30 parts of aluminum sulfate, 10-20 parts of calcium chloride, 0.5-1.5 parts of an activating agent and 5-10 parts of methyl acrylate. The high-strength fly ash cement is high in fly ash content, and thus a large amount of fly ash can be well effectively utilized; meanwhile, the requirement for high strength of ordinary Portland cement can be met.

Description

technical field [0001] The invention relates to the technical field of cement, in particular to a high-strength fly ash cement. Background technique [0002] The mixing amount of fly ash in the existing fly ash cement is not very high, because a large amount of fly ash will lead to a significant reduction in the early strength of the final formed fly ash cement. Now due to the extensive use of coal, a large amount of fly ash produced after coal combustion needs to be treated urgently. At the same time, because fly ash contains a large amount of alumina Al2O3 and sulfur oxide SiO2, it will affect the operability of the composite cement after configuration. The flow properties of the composite cement in the construction, as well as the molding time of the cement in use and the composite cement. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a high-strength fly ash cement....

AI Technical Summary

Problems solved by technology

[0002] The amount of fly ash mixed in the existing fly ash cement is not very high, because a large amount of fly ash will lead to a significant reduction in the early strength of the final formed fly ash cement

Now due to the extensive use of coal, a large amount of fly ash produced after coal combustion needs to be treated urgently. At the same time, because fly ash contains a large amount of alumina Al2O3 and sulfur oxide SiO2, it will affect the operability of the composite cement after configuration. The flow properties of the composite cement in the construction, as well as the molding time of the cement in use and the composition of the composite cement