Method for preparing insulating brick by utilizing sludge in lakes in central plains of China

Abstract

The invention discloses a method for preparing an insulating brick by utilizing sludge in lakes in central plains of China and belongs to the technical field of waste treatment and building materials.The insulating brick is prepared from the following raw materials in parts by mass: 45-55 parts of lake sludge; 10-15 parts of clamshell; 20-35 parts of coal cinder; and 5-15 parts of plant fallen leaves. The specific preparation method comprises the following steps of: mixing lake sludge and plant fallen leaves according to a certain ratio; the uniformly stirring the lake sludge and the plant fallen leaves to obtain sludge slurry; crushing clamshells and coal cinder; carrying out ball milling to obtain powder; weighing the clamshell powder and coal cinder powder according to a certain ratio;adding the sludge slurry; performing uniform stirring to obtain mixed slurry; carrying out sealed aging at room temperature for 24 hours; and carrying out compression molding on the slurry in a brickmaking mold to obtain a green brick blank; and putting the green brick blank into a kiln, after preheating the green brick blank for a period of time, sintering the preheated green brick blank according to a certain temperature system; and carrying out air cooling on the sintered green brick blank to room temperature along with the kiln to obtain the insulating brick. The porosity of the insulating brick is 18.0-27.3%; the compressive strength of the insulating brick is 21.0-27.5 MPa; the heat conductivity coefficient of the insulating brick is 0.38-0.51 W / (m.K); the reuse of wastes such as sludge, clamshells, coal cinder and plant fallen leaves in the lakes in the central plains of China is realized, environmental pollution is reduced, and the production cost of building materials is reduced.

Description

technical field [0001] The invention belongs to the technical field of waste treatment and building materials, and in particular relates to a method for preparing heat-insulating bricks from lake mud in the Central Plains. Background technique [0002] With the rapid development of human society and economy, the demand for natural resources is increasing day by day, while fossil energy is gradually exhausted. Therefore, energy conservation and emission reduction have gradually attracted people's attention and attention. More than 50% of my country's total social energy consumption is consumed in the construction field. energy, while the building envelope and external walls and energy consumption account for more than 45% of building energy consumption. Building energy conservation, especially the thermal insulation and energy saving of external walls, is the top priority of energy conservation and emission reduction. Therefore, the development of buildings with good thermal in...

AI Technical Summary

Problems solved by technology

If the large amount of silt excavated is not treated in time, it will not only seriously threaten the ecological environment, but also easily enter the lake again under the action of rainwater, and cause pollution to the lake again, wasting the manpower, material and financial resources spent on dredging. Solving the problems of waste pollution and shortage of wall raw materials is a daunting task for the construction industry