Brick fragments with water treatment plant sludge as raw material and preparing method and application thereof

Abstract

The invention relates to the field of materials, and particularly discloses brick fragments with water treatment plant sludge as a raw material and a preparing method and application thereof. According to the brick fragments, the water treatment plant sludge, hill sand, silicate cement and a non-ionic surfactant serve as main raw materials, recycling of the remaining water treatment plant sludge is achieved, the using ratio of the sludge in the raw materials of the brick fragments is significantly increased, and the problem in the prior art that it is hard to efficiently utilize the water treatment plant sludge is solved. The brick fragments prepared by means of the preparing method are good in durability, have certain skid resistance, water permeability and water storage performance, andcan be used as bricks for side pavements, the drainage performance of the side pavements can be improved, and the brick fragments have certain cooling performance. The bending strength of the preparedbrick bodies is about 3-4 MPa, when the brick bodies need to be abandoned, a crusher can be utilized for crushing, and the brick fragments can be restored to natural soil without furthermore treatment.

Description

technical field [0001] The invention relates to the field of materials, in particular to a brick made of sludge from a water supply plant and its preparation method and application. Background technique [0002] Water supply plants usually use river water as influent water for water treatment. During the water treatment process, a large amount of excess sludge will be produced due to soil and sand settlement and soil separation. In general, the excess sludge from the water supply plant is reused as horticultural farm soil, road backfill materials or cement raw materials, and the rest is disposed of as industrial waste landfill. [0003] According to the records of the prior art, there is a technical solution for recycling surplus sludge from water supply plants to make permeable simple paving materials. Specifically, the residual sludge from the water supply plant is dried and powdered, and then granulated, and calcium sulfate monohydrate is added as a hardening material to...

AI Technical Summary

Problems solved by technology

However, the excess sludge used to prepare the concrete only accounts for less than 10% of the total amount of raw materials, and the utilization rate of the excess sludge is relatively low.

However, if the proportion of residual sludge in the concrete is increased, the strength of the concrete will be adversely affected.

[0005] Therefore, according to the reports of the current prior art, it is still difficult to realize the large-scale reuse of surplus sludge

The use of it as horticultural farm soil or backfill material for road construction will also be limited. Landfilling the remaining sludge from water supply plants will require huge costs and will have a negative impact on the environment.

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