Flow-regime concrete mix with tailings in place of river sand

Abstract

The invention relates to a flow-regime concrete mix with tailings in place of river sand. The concrete mix is characterized by comprising the following components in part by weight according to a production formula: 100 to 150 parts of portland cement, 220 to 330 parts of gravel, 156 to 234 parts of tailings, 1 to 1.5 parts of water reducing agent and 50 to 75 parts of water. The concrete mix has the advantages that: because the tailings can be reasonably mixed with the cement, the gravel, the water reducing agent and the water and stirred and mixed by a stirrer, the concrete mix for pouring various buildings, construction beams, plates, columns, foundations, pavements and the like can be manufactured; and the mix concrete has a uniform structure, so that the volume shrinkage, such as chemical shrinkage, drying shrinkage and the like, produced during hardening of set cement can be suppressed and reduced. Thus the produced concrete mix has high fluidity and durability, can effectively suppress and reduce the volume shrinkage produced during the hardening of the set cement and prevent the concrete from cracking, so that the high-added-value resource utilization of the tailings can be realized.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a fluid concrete mixture which uses tailings instead of river sand. Background technique [0002] Concrete is an indispensable raw material for building materials. The annual consumption of concrete in the country is about 600 million cubic meters, and the mixing ratio of river sand per cubic meter of concrete is about 0.4 cubic meters. The annual consumption of river sand is as much as 240 million cubic meters. River sand resources in my country are indeed very tight, and river sand mining has seriously damaged natural river courses. Taking Anshan City as an example, urban construction needs to consume a large amount of river sand every year. The fluid concrete alone needs about 1.5 million cubic meters of river sand every year. There are other river sand consumptions such as concrete, masonry mortar, and plastering mortar. It is estimated that the river s...

AI Technical Summary

Problems solved by technology

At present, there are few domestic and foreign research results on tailings instead of river sand, and there are no systematic results. There is no report that it can be successfully applied to actual concrete engineering.