RED MUD-BASED CEMENTING MATERIAL, RED MUD-BASED LIGHTWEIGHT AGGREGATE, RED MUD-BASED LIGHTWEIGHT AGGREGATE CONCRETE AND PREPARATION METHOD THEREFOR

摘要

Disclosed in the present invention are a red mud-based cementing material, red mud-based lightweight aggregate, red mud-based lightweight aggregate concrete and a preparation method therefor. The red mud-based cementing material having a high performance and a low cost, a geopolymer cementing material, a foaming agent and an organosilicon waterproofing agent material are used, improving the performance of the red mud-based lightweight aggregate, and thus improving the performance of the lightweight aggregate concrete, i.e., improving the strength of the red mud-based lightweight aggregate/lightweight aggregate concrete, and improving the durability of the red mud-based lightweight aggregate/lightweight aggregate concrete. The red mud-based cementing material is a sulfur-aluminum-based cementing material having a low alkalinity, and a geopolymer such as sodium aluminosilicate/calcium aluminosilicate formed in the preparation process of the red mud-based lightweight aggregate, and Na+ can be cured. In the combination of the red mud-based cementing material and Na+, the alkalinity of the concrete is reduced while the strength of the uncalcined lightweight aggregate is improved, alleviating the alkali aggregate reaction of the lightweight aggregate concrete, and improving the durability of the lightweight aggregate concrete. The addition of the hydrogen peroxide foaming agent can reduce the density of the uncalcined lightweight aggregate, and the organosilicon waterproofing agent can reduce the water absorption rate of the uncalcined lightweight aggregate.