Method for preparing soil powder curing agents through recycled iron slime

Abstract

The invention discloses a method for preparing soil powder curing agents through recycled iron slime, and belongs to the field of soil curing agents. The method for preparing the soil powder curing agents includes the steps that the recycled iron slime and a sulfuric acid solution are mixed to be reacted, and suction filtration is carried out to obtain filter liquor; the filter liquor is mixed with grinded iron powder to obtain a reduction solution, and sodium hydroxide is added to adjust the pH; then heating is carried out in a thermostatic water bath mode, a hydrogen dioxide solution is added to be mixed, and then the pH is adjusted through sodium hydroxide; after sediment is generated, magnetic stirring refluxing and centrifugal separation are carried out on the sediment mixed liquor to obtain the lower-layer sediment, and the lower-layer sediment is dried to obtain Fe3O4 powder; the powder is mixed with deionized water, heating stirring is carried out, an ammonia liquor solution is dropwise added, oleic acid is added to carry out reaction, and the soil powder curing agents are prepared after filtering, washing and drying are carried out. The method has the advantages that the soil powder curing agents are good in curing effect; after the soil powder curing agents are used, a soil body is high in strength and compact in curing, and fracturing, caused when a thermal expansion and cold contraction phenomenon is caused by changes of the environment and the temperature, of the soil body is not prone to occurrence; compared with other methods, construction cost can be reduced by 40% to 50%, and two fifths of a construction period can be shortened.

Description

technical field [0001] The invention relates to a method for preparing a soil powder solidifying agent by recycling iron mud, and belongs to the field of soil solidifying agents. Background technique [0002] Soil stabilizer is a new type of energy-saving and environmental protection engineering material synthesized from various inorganic and organic materials to stabilize various soils. For the soil to be reinforced, according to the physical and chemical properties of the soil, it only needs to be mixed with a certain amount of curing agent, and the required performance index can be achieved after mixing and compacting. The utility model has the advantages of excellent technical index for road use, low construction cost, convenient construction, shortened construction period, and is especially beneficial to ecological environment protection. The use of soil curing agent can replace a large amount of traditional road construction materials such as lime, cement, fly ash, gr...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention: In view of the low early strength of the use of the inorganic binder soil curing agent, it is greatly affected by the environment and temperature, and the soil after curing is alkaline, resulting in a long engineering process cycle and easy cracks during curing , the disadvantages of causing harm to the ecological environment, providing a method of recycling iron mud to prepare soil powder curing agent, the method makes full use of recycled iron mud to prepare soil powder curing agent, and makes it have lipophilic and hydrophobic properties through dispersion modification , has a good curing effect. After use, the soil has high strength, compact solidification, low shrinkage and expansion coefficient, and is not easy to be affected by environmental and temperature changes, resulting in thermal expansion and contraction, resulting in soil cracks