Modified building residue baking-free brick

Abstract

The invention discloses a modified building residue baking-free brick. The modified building residue baking-free brick is prepared from, by mass, 65 to 75% of building residue, 10 to 15% of sand, 5 to 15% of cement, and 2 to 5% of industrial lime. The modified building residue baking-free brick is prepared via following steps: 1) building residue generated in subway construction processes is subjected to simple ball milling so as to obtain building residue powder; 2) the ingredients above are weighed according to the ratio above, and water-solid ratio is controlled to be 0.20 to 0.24; 3) cement, lime, gypsum, and sand are uniformly mixed with the building residue powder, water is added for uniform mixing, an obtained mixed material is subjected to extrusion forming, and curing under natural conditions for 3 to 7 days, is delivered into a drying oven, and is dried to be constant in weight at 40 to 60 DEG C so as to obtain the modified building residue baking-free brick. The modified building residue baking-free brick is cheap; a large amount of building residue can be recycled; environmental pollution and soil waste are reduced; compressive strength is high; water resistance is excellent; the modified building residue baking-free brick is capable of satisfying performance requirements of building bricks, and can be used for replacing sintering clay bricks.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a modified muck-free brick. Background technique [0002] With the continuous advancement of the urbanization process, urban rail transit, especially subways, light rails and other means of transportation, are favored by people because of their convenience, safety, and large transportation volume. However, with the construction of subways and light rails, a large amount of muck will be produced; according to calculations, a general construction of a subway with a total length of 30 kilometers will generate more than 4.5 million m3 of muck, which can fill the water of about 4 countries. cube. A large amount of muck will cause many problems during the standby period: for example, the problem of the storage site of muck, a large amount of muck needs a lot of space, and the past storage point is selected in the suburbs, which not only destroys the cultivated land, but a...

AI Technical Summary

Problems solved by technology

A large amount of muck will cause many problems during the standby period: for example, the problem of the storage site of muck, a large amount of muck needs a lot of space, and the past storage point is selected in the suburbs, which not only destroys the cultivated land, but also affects the local ecological environment. influences

In addition, there is the problem of air pollution. The dust in the muck enters the air with the wind, which affects the air quality of the city.

If the muck is dumped, landfilled or used as roadbed filler, it will either pollute the environment, occupy a large amount of land, or have low utilization rate and added value.