Method for preparing heat insulation anti-cracking raw soil bricks

Abstract

The invention discloses a method for preparing heat insulation anti-cracking raw soil bricks. The method is characterized in that: calcined desulfurization gypsum, desulfurization ash, crop stalk powder, re-dispersible latex powder, surfactant, clay and water in a water-solid ratio of 0.3 to 0.5 are adopted in the method; and the bricks are prepared by adopting the steps of mixing, stirring, molding, curing and the like. The method effectively utilizes desulfurization wastes of a coal fired power plant and agricultural solid waste crop straws, has the advantages of low cost, good mechanical property and durability, good cracking resistance, thermo-technical performance and the like, is convenient for production and can be recycled.

Description

[0001] technical field [0002] The invention relates to a wall material used for village and town construction, in particular to a raw earth brick. [0003] Background technique [0004] Raw soil generally refers to unroasted soil materials that have only been processed in a simple and dense manner without being roasted. Raw soil can be formed into bricks of various sizes after being pressed or poured. Raw soil bricks can be used to build 1-3 storey raw soil buildings. Since the formation of human society, "raw soil" has always been the most important building material. Chinese adobe buildings have a history of at least 6,000 years. Many ancient adobe buildings have been preserved to this day, and they have become witnesses and historical treasures of Chinese civilization. At present, about 1 / 3 of the world's population still lives in adobe buildings, and there are still more than 100 million people living in various types of adobe buildings in rural my country. Raw earth...

AI Technical Summary

Problems solved by technology

[0008] ① The strength of lime-modified raw soil materials develops slowly, which is not conducive to mold turnover, resulting in extremely poor early water resistance of raw soil materials;

[0009] ②Large drying shrinkage and easy cracking may lead to serious and unsolvable cracking problems in the walls of modified raw soil building materials, seriously affecting the appearance of raw soil building walls, and resulting in a significant decline in thermal performance;

[0010] ③Easy to soften, poor water resistance, poor volume stability

[0012] ①The cost is high, the drying shrinkage rate is large, and it is easy to crack;

[0013] ②The volume stability is difficult to meet the requirements. In the environment with large changes in dryness and humidity, its volume stability will gradually deteriorate, resulting in severe cracking and even loss of strength;

[0014] ③Cement is a strong alkaline material, which is not conducive to the recycling of raw soil materials after they are discarded

On the whole, the utilization rate and utilization level of straw in my country are very low. Due to the unreasonable utilization of straw, large areas of straw are burned in many areas, which seriously pollutes the air and threatens the traffic safety of aviation and highways.

Since the existing technology is still difficult to fully utilize the straw produced every year, it is of great application value to develop a technology that effectively utilizes a large amount of straw to produce building materials