Double-layer unfired water permeable brick with silicon manganese alloy waste residue as aggregate and preparation method thereof

Abstract

The invention relates to a double-layer unfired water permeable brick with silicon manganese alloy waste residue as aggregate and a preparation method thereof. According to the technical scheme of the double-layer unfired water permeable brick with the silicon manganese alloy waste residue as the aggregate, thickness ratio of a surface layer to a base layer is 1:(8-15), the surface layer is prepared from the following raw materials: 55-70wt% of water-quenched silicon manganese alloy waste residue with the granularity of 0.063-0.34mm, 20-35wt% of portland cement, 5-15wt% of water, 0-0.3wt% of a water reducing agent and 0.5-3wt% of pigment; and the base layer is made from the following raw materials: 50-70wt% of water-quenched silicon manganese alloy waste residue with the granularity of 0.34-3mm, 20-35wt% of Portland cement, 0-15wt% of broken stones, 5-15wt% of water and 0-0.3wt% of the water reducing agent. The preparation method comprises the following steps: firstly uniformly mixing the raw materials of the base layer, putting the mixture into the bottom of a mould, and tamping; carrying out static pressure moulding, pressurizing for 30-40 seconds, demoulding, and maintaining, so that the double-layer unfired water permeable brick with the silicon manganese alloy waste residue as the aggregate is obtained. The double-layer unfired water permeable brick with the silicon manganese alloy waste residue as the aggregate has the advantages that energy consumption is low, the cost is low, the appearance is beautiful and the waste residue is changed into things of value.

Description

technical field [0001] The invention belongs to the technical field of fire-free permeable bricks. In particular, it relates to a double-layer fire-free permeable brick with silicon-manganese alloy waste slag as an aggregate and a preparation method thereof. Background technique [0002] At present, the ceramic bricks and cement bricks used in the construction of sidewalks, pedestrian streets, squares and other public places have the problem of poor water permeability. Issues such as ground subsidence and the "heat island" effect. Permeable bricks are a key organism in the construction of sponge cities, and are also an ecological pavement building material. The use of permeable bricks can intercept part of the rainwater and make it penetrate into the surface layer to compensate for groundwater resources. The exchange of water, so as to achieve the regulation of urban surface temperature and humidity. Therefore, the research on permeable bricks has attracted the attention ...

AI Technical Summary

Problems solved by technology

Therefore, the research on permeable bricks has attracted the attention of technicians: such as the patented technology of "a sintered permeable brick and its preparation method" (CN105601254A), although the water permeability and flexural strength of the permeable brick can reach the national standard, it needs to be pressed into shape And high temperature calcination, more energy consumption and high cost

As described in "A Concrete Permeable Brick Using Steel Slag as Aggregate" (CN101007723A), although the permeable brick does not require high-temperature sintering, the color of the brick is single and the surface is rough, which is not conducive to beautifying the environment

[0003] Silico-manganese alloy waste slag is the waste slag produced during the production of silicon-manganese alloy. At present, it is mainly used in the manufacture of cement, small hollow blocks, heat insulation materials and concrete coarse and fine aggregates. The abrasiveness is poor, and its utilization rate is very low. So far, there are still a large number of silicon-manganese alloy slags that have not been processed and utilized in ferroalloy factories.

These accumulated waste residues not only occupy land, consume management fees, but also cause environmental pollution and other problems.