Curing agent for salinized sludge to achieve soil hardening and applications thereof

Abstract

The invention discloses a curing agent for salinized sludge to achieve soil hardening and applications thereof. The curing agent is prepared by mixing high aluminum cement, calcium carbonate, talcum powder, a water reducer, lime, a sulfur-containing mixture, and a condensate namely sodium salts of beta-sulfonated naphthalene-formaldehyde. The curing agent is fully mixed with salinized soil to carry out reactions, then pressing the soil, and then the soil is subjected to maintenance for 7 to 28 days so as to complete the modification hardening. After the soil is cured by the curing agent, the unconfined compressive strength of the salinized soil can reach 7.9 MPa, far from the lowest standard of 3.2 MPa, and moreover the strength lifting space is very big and can reach 9 to 10 MPa. At the same time the cured soil shows prominent uniqueness and excellence in performances such as water stability, anti-corrosion property, and high strength resistant property. The curing agent can carry out hardening treatment on salinized soils on site, solves the hardening problem of high salt content soil in salt fields, seaside, and the like, and has very big economic and social profits.

Description

technical field [0001] The invention relates to a high-efficiency soil curing agent suitable for saline silt, in particular to a curing agent for saline silt soil hardening and application thereof. Background technique [0002] At present, there are many types of soil stabilizers used for non-saline soil at home and abroad, and the research and development of new soil stabilizers is also changing with each passing day. Because of the different fields of application, the types of stabilizers used are also very different, and some have no restrictions on them. High compressive strength requirements, such as road construction; some have special requirements for its frost resistance, such as project construction in northeast, northwest and other severe cold regions; some need to be immersed in water flow environment for a long time, such as water conservancy projects in various regions Construction; some have remarkable effects on corrosion resistance of acids, alkalis, salts an...

AI Technical Summary

Problems solved by technology

However, a large amount of silty soil formed by land reclamation cannot be directly used as backfill soil and foundation soil for construction sites, and must be cleaned or modified and hardened.

In the salt pans and beaches along the coast of Jiangsu and Zhejiang, the saline silt is 15-20 meters deep under the surface. In this way, according to the traditional silt treatment method, the cost will be very high, the economic benefit is also low, and the effect is not ideal.

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