Solidification agent for deep stirring muddy soil, preparation method and application method thereof

Abstract

The invention discloses a curing agent for deep stirring muddy soil, a preparation method and a use method thereof, and belongs to the field of muddy soil curing agents. Among them, the curing agent includes the following components by weight: 30-40 parts of cement, 30-40 parts of papermaking lime mud, 20-40 parts of magnesium-based substrate waste materials; the sum of the weight parts of the above-mentioned components is 100 parts; magnesium-based The MgO content in the sheet waste is ≥30wt%. The curing agent of the invention has high strength after curing and strong impermeability.

Description

technical field [0001] The invention relates to the field of silty soil curing agents, in particular to a curing agent for deep stirring silty soil and a preparation method thereof. Background technique [0002] In Guangdong area, the distribution of soft soil is relatively extensive and prominent, so the construction of highway and track projects must take corresponding foundation reinforcement measures to ensure the safety and durability of the project. The cement-soil mixing method is widely used in the treatment of weak foundations in road engineering, bridge engineering, sluices, ports, etc. due to its advantages such as good pile stability, less lateral extrusion, and less impact on the surrounding environment. [0003] Traditional cement mixing piles usually use cement as a curing agent to harden soft soil to improve foundation strength. However, soft soil has the characteristics of high water content, large void ratio, low strength, large deformation, and long consol...

AI Technical Summary

Problems solved by technology

[0003] Traditional cement mixing piles usually use cement as a curing agent to harden soft soil to improve foundation strength. However, soft soil has the characteristics of high water content, large void ratio, low strength, large deformation, and long consolidation time. The cement hydrates in the soil. The environment is harsh, it is difficult to form dense and stable gelling hydration products, and there is a serious shortage of strength, resulting in a relatively short effective pile length, making it difficult to achieve a good pile-forming effect

Cement has poor or no effect in strengthening soils with high moisture content

[0004] On the other hand, paper mills will produce a large amount of lime mud waste in the causticizing process. The amount of lime mud produced by papermaking in my country is about 3 million tons per year, and the current resource utilization is not high.

Due to the advantages of environmental protection and good safety, magnesium-based inorganic cementitious materials have been widely used in the construction industry in recent years. However, during the production process of magnesium-based decorative panels, a large amount of waste will be generated due to cutting, polishing and other processes. At present, it is mainly piled up anywhere, and has not been widely recycled.

Images