Non-sintered residual soil brick-making formula

Abstract

The invention discloses a brick making method using non-sintered residual soil, adopting residual soil, cement, calcium oxide, calcium sulfate and fly ash as materials. Due to large sand content of residual soil and thick sand grain, the invention plays a good role as framework and effectively reduces drying shrinkage. The added fly ash can increase the silt content of the residual soil, so as to adjust the graduation of the residual soil. The calcium oxide can expand after hydrolysis for offsetting the volume shrinkage of the brick body during freezing, and then, is combined with carbon dioxide generating calcium carbonate for cementation. The activities of the fly ash, the calcium oxide and the silicon dioxide are stimulated by calcium sulphate, further improving the product strength. The calcium sulfate simulates the activities of the fly ash, the calcium oxide and the silicon dioxide, improving the strength of the product further. The invention has the advantages of utilizing building unproductive soil, protecting environment and saving energy due to the adoption of residual soil in the seaboard as materials.

Description

technical field [0001] The invention relates to building bricks, in particular to a formula for making bricks from non-fired residual soil. Background technique [0002] The traditional firing of bricks consumes a large amount of high-quality clay and is fired at high temperature; for a long time, it not only consumes land resources and energy, but also the complicated kiln firing process is time-consuming and labor-intensive, and pollutes and endangers human existence. . As a result, non-sintered clay bricks appeared, which were formed by adding clay, lime, cement, fly ash and other materials, and then steamed or naturally cured without sintering. However, the bricks made by this method will shrink greatly during the curing and drying process, which will cause cracks in the brick masonry, which will affect the normal use of the building in the slightest, and make the building a dangerous building and be scrapped in severe cases. Contents of the invention [0003] The pu...

AI Technical Summary

Problems solved by technology

However, the bricks made by this method will shrink greatly during the curing and drying process, which will cause the brickwork to crack, which will affect the normal use of the building in the slightest, and make the building a dangerous building and be scrapped in severe cases.