Soft sandstone modified material

Abstract

The invention provides a soft sandstone modified material, and belongs to the field of building materials. The soft sandstone modified material comprises soft sandstone or soft sandstone primary rock, a diagenesis admixture with volcanic ash activity or potential hydraulicity, general purpose Portland cement and water, wherein the mass percent of the diagenesis admixture with volcanic ash activity or potential hydraulicity is 0.5%-60%, the mass percent of the soft sandstone or soft sandstone primary rock is 40%-90%, the mass percent of the general purpose Portland cement is 0.5%-10%, the mass percent of a diagenesis agent is 0.5%-15%, and the mass percent of the water is 5%-20%. The soft sandstone modified material has the advantages of high strength, small air shrinkage deformation, strong water resistance, easiness in obtaining of materials and manufacturing, simplicity and convenience in a construction manner and the like. The compressive strength of the soft sandstone modified material at 90 days can reach 3Mpa-25Mpa, and the soaking softening coefficient of the modified material can be above 0.7.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a modified arsenic sandstone material. Background technique [0002] Pisha sandstone is an incompletely developed mudstone and siltstone whose mineral components are mainly quartz, calcium montmorillonite and calcite, and is mainly distributed in the border areas of Shanxi, Shaanxi and Mongolia. The area where the sandstone is distributed is the most concentrated sand-producing area of ​​clastic bedrock in the Loess Plateau. The coarse sediment that enters the Yellow River accounts for about 62% of the total amount of coarse sediment in the Yellow River. The sandstone is the main source of the yellow sediment in the middle reaches of the Yellow River. In addition, the soil erosion in the Pishasha area is serious, and the terrain is fragmented, which has brought catastrophic effects on the local agricultural development and ecological environment. Every year, our country invests...

AI Technical Summary

Problems solved by technology

Most of the existing check dams are built directly by stacking and rolling Pisha sandstone. The design standard is low, the strength of the dam body material is low, and the impermeability is poor.

Therefore, check dams are often washed away by floods or soaked after rainfall, causing property losses to local people

Due to the limitations of local infrastructure and traffic conditions, materials imported from outside to build a check dam are expensive and difficult to construct