Production method and product of multifunctional lightweight sludge concrete

Abstract

The invention belongs to the technical field of concrete products and particularly relates to a production method and a product of multifunctional lightweight sludge concrete. According to the method, sludge produced through sewage treatment reacts with quicklime firstly, and sludge slaked lime is formed; the sludge slaked lime is then mixed with cement and water, and the lightweight sludge concrete is formed. The production method cannot cause environmental pollution, is low in cost and can solve the problem about sludge treatment in the sewage treatment industry, the lightweight concrete with multiple purposes can be produced through recovery and utilization of the sludge, and the sludge concrete produced with the production method has the performance of light weight, pressure resistance and the like and can be taken as a building filling material.

Description

technical field [0001] The patent of the invention belongs to the technical field of concrete products, and in particular relates to a production method and product of multifunctional lightweight sludge concrete. Background technique [0002] Sewage treatment is the process of concentrating the impurities in sewage into semi-solid form and then separating them from the fluid. The separated paste concentrate is sludge. Sludge treatment has always been a difficult problem in the sewage treatment industry. Sludge treatment equipment accounts for about 40%-60% of the infrastructure investment of sewage treatment plants, and about 50% of the cost of sewage treatment plants is sludge treatment costs. [0003] The traditional production method of multifunctional lightweight sludge concrete is to firstly dehydrate and dry the sludge, and then incinerate or landfill it. Such a treatment method has the following disadvantages and difficulties: because the sludge is in the form of pas...

AI Technical Summary

Problems solved by technology

Such a treatment method has the following disadvantages and difficulties: because the sludge is in the form of paste, the moisture content of the original sludge is as high as 95%, and it must be dehydrated and dried many times, requiring expensive dehydration and drying equipment and huge energy consumption, and A huge treatment site is required; incineration of sludge will seriously pollute the air; because the sludge contains a variety of heavy metals and other toxic and harmful substances, after landfilling, these heavy metals and toxic and harmful substances will seep into the groundwater and seriously pollute the groundwater; dehydration and drying are completed The sludge is incinerated and landfilled as waste, not only does not make the sludge recycled, but also the huge dehydration, drying, incineration, landfill and other costs and expenses are undoubtedly a serious waste