Grouting material employing red mud as raw material

Abstract

The invention discloses a grouting material employing red mud as a raw material. The grouting material used in grouting engineering is a cement-based material, and the cement-based material is poor in stability, low in stone effect and low in binding power. The red mud is an industrial solid waste discharged from aluminum-making industry, so that the utilization rate is low, and the environment is polluted. The grouting material employing the red mud as the raw material comprises the following main components in parts by weight: 50-65 parts of red mud, 4-8 parts of an excitant, 20-40 parts of an active initiator, 1-5 parts of silica fume, 0.5-1 part of a retarder, 0.5-1 part of a surfactant and 0.5-1 part of a water-retaining agent. The grouting material has the advantages of good liquidity, high consolidation strength and wide grouting range, and the slurry is high in binding force with cement concrete and soil in the solidification process. The strength, stone rate and liquidity of the grouting material are improved; the liquidity of the prepared slurry is greater than 15s; the liquidity is still greater than 15s after the slurry is placed for 30 minutes; the stone rate is 99%; the 3d compressive strength is 3.2MPa; and the 28d compressive strength is greater than 12MPa.

Description

technical field [0001] The invention relates to a grouting material using red mud as a raw material, and belongs to the technical field of building materials. Background technique [0002] Red mud is an industrial solid waste discharged from the aluminum industry after extracting alumina from bauxite. It generally contains a large amount of iron oxide and has a similar appearance to red soil, hence the name. According to the quality of bauxite, it can be divided into sintering method, Bayer method and mixed method red mud. Generally, for every 1 ton of alumina produced, 1.0 to 2.0 tons of red mud is incidentally produced. According to incomplete statistics, my country's annual discharge of red mud is as high as tens of millions of tons, and it has accumulated more than tens of millions of tons. The utilization rate of red mud is low, and the utilization rate does not exceed 7%. A large amount of red mud cannot be fully and effectively utilized. We can only rely on large-ar...

AI Technical Summary

Problems solved by technology

[0003] At present, the grouting materials widely used in grouting projects such as buildings and concrete are generally cement-based materials, plus other fillers. The fillers mainly include fly ash, steel slag, slag, coal gangue, etc. The grout of such grouting materials is stable. Poor resistance, low calculus effect, and in addition, there are shortcomings of poor adhesion

Patent CN1699245A discloses fly ash-based grouting material, the main raw materials are calcium-increasing fly ash, cement, water reducing agent, admixture, etc., but its fluidity is poor, and the use of water reducing agent is likely to cause incomplete cement curing , not reaching the desired strength