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Salinized soil curing agent prepared from industrial waste slag

A technology for industrial waste residue and saline soil, applied in the fields of application, agriculture, soil conditioning materials, etc., can solve the problems of unsatisfactory utilization rate of calcium carbide slag and waste gypsum, and achieve the effects of easy realization, easy preservation and simple operation.

Inactive Publication Date: 2011-04-06
武汉华荣科技发展有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the utilization rate of calcium carbide slag and waste gypsum is not ideal, and the stock of these waste residues is still growing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A sulfate saline soil has a water content of 25% and a salt content of 5%. The curing agent is composed of components (i) and (ii), component (i) is a combination of steel slag and blast furnace slag, accounting for 50% and 40% of the total mass respectively, totaling 90%; component (ii) is calcium carbide slag and slaked lime, account for 5% and 5% of the total mass respectively, totaling 10%. Grind each component until the specific surface area is 350m 2 / kg for mixing. The curing agent is fully mixed with saline soil, stirred evenly, and then paved and rolled according to a certain process to form a solidified soil roadbed or simple road surface with a certain bearing capacity and stability.

Embodiment 2

[0027] A chlorine saline soil has a water content of 70% and a salt content of 8%. The curing agent is composed of components (i), (ii) and (iii), component (i) is steel slag, accounting for 75% of the total mass; component (ii) is calcium carbide slag, accounting for 10% of the total mass; Part (iii) is phosphogypsum, accounting for 15% of the total mass. Mix and grind the components until the specific surface area is 400m 2 / kg. Saline soil solidification construction is carried out by deep mixing method.

Embodiment 3

[0029] A chlorine saline sludge has a water content of w=120% and a salt content of 9%. The curing agent is composed of components (i), (ii), and (iii), and component (i) is a composition of steel slag and phosphorus slag, accounting for 45% and 20% of the total mass respectively, totaling 65%; component ( ii) is a combination of carbide slag and quicklime, accounting for 15% and 10% of the total mass respectively, totaling 25%; component (iii) is flue gas desulfurization gypsum, accounting for 10% of the total mass. Mix and grind the components until the specific surface area is 400m 2 / kg. Using the construction technology of land reclamation by dredging and filling silt with application number 200910083099.5, the saline silt is fully mixed with the curing agent, and then blown and filled in the reclamation area to form a foundation with a certain bearing capacity.

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Abstract

The invention relates to a salinized soil curing agent prepared from industrial waste slag. The salinized soil curing agent prepared from the industrial waste slag consists of the following components in percentage by mass: (i) 60 to 95 percent of steel slag or composition of steel slag and one or more of other industrial waste slag, (ii) 4 to 25 percent of carbide slag and (iii) 0 to 20 percent of waste industrial gypsum. A preparation method of the salinized soil curing agent comprises the following steps of: (1) drying the component (i), the component (ii) and the component (iii), and grinding the components respectively or mixing the components and grinding the mixture until the specific surface area is 250 m<2> / kg to 600 m<2> / kg; (2) determining the mass percentage of the component (i), the component (ii) and the component (iii) according to the salt content and the physical and chemical properties of the salinized soil and the target strength of the solidified soil, and mixing and stirring the component (i), the component (ii) and the component (iii) uniformly to obtain the salinized soil curing agent.

Description

(1) Technical field: [0001] The invention relates to a curing agent suitable for curing saline soil made by using industrial waste residue, and belongs to the field of civil engineering foundation treatment. (two) background technology: [0002] When the soluble salt content in the rock and soil reaches more than 0.3%, and has engineering characteristics such as dissolution, salt expansion, and corrosion, the rock and soil are called saline soil. Due to its physical, chemical and mechanical properties are very different from general rock and soil, it is listed as special soil in the field of engineering geology and foundation engineering. Saline soil is widely distributed in our country. With the rapid development of our country's economy, the national coastal strategy and the western development strategy are further promoted, more and more basic engineering constructions are located in saline soil areas. The problem of stained soil treatment is also increasing. [0003] T...

Claims

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Application Information

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IPC IPC(8): C09K17/06C09K103/00
Inventor 程寅黄新
Owner 武汉华荣科技发展有限责任公司
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