Method for preparing environment-friendly water permeable bricks by using water supply sludge

Abstract

The invention discloses a method for preparing environment-friendly water permeable bricks by using water supply sludge, and belongs to the field of solid waste recycling and building material production in the environmental engineering. About 10 percent of adhesive is added in 30-4 percent of water supply sludge, 10-20 percent of flyash and 30-35 percent of general construction sand for evenly mixing; then 12-14 percent of water by the dry weight of total materials is added for evenly mixing, and is stored in the constant-temperature environment for a certain time; the compression molding is implemented with a certain pressure; the room temperature is gradually increased to the temperature of 1,150 DEG C; the temperature of 1,150 DEG C is kept for 1 hour, and is naturally cooled to the room temperature; and then finished products are obtained. Through detection, main product technology indexes accord with associated national standards. The method uses the water supply sludge as the main raw material for preparing the water permeable bricks, so that on the one hand, the novel preparation raw material can be provided to the building materials, and on the other hand, the novel path can be provided for treating the water supply sludge; and the method has excellent environmental effect and social effect.

Description

technical field [0001] The invention relates to a solid waste recycling technology and production of building materials, in particular to a method for preparing environment-friendly permeable bricks from water supply sludge. Background technique [0002] The surface of modern cities is covered by more and more buildings and concrete. This "hardening" of the surface makes it difficult for atmospheric precipitation to penetrate into the ground in time. On the one hand, the lack of surface water supply causes the groundwater level to drop; on the other hand, the increase in surface runoff increases the burden on the drainage system and is prone to floods. Therefore, permeable bricks were invented to allow rainwater to permeate quickly to alleviate the shortage of groundwater and reduce the probability of flood disasters, reducing the pressure on urban drainage systems and sewage treatment costs. At the same time, with the pollution of the water source of the water supply plant...

AI Technical Summary

Problems solved by technology

However, most of the above permeable bricks prepared from solid waste have high toxicity and low safety.

Feedwater sludge has less heavy metal content, less other harmful substances, and low toxicity, and the research on the use of feedwater sludge to prepare permeable bricks has not been reported, and there is no domestic patent related to the use of feedwater sludge to prepare permeable bricks

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