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Soft soil curing agent prepared by means of industrial residues

A technology of industrial waste slag and curing agent, applied in the field of environment-friendly soft soil consolidation materials and soft soil curing agent, can solve the problems of serious environmental pollution, achieve great economic and environmental benefits, reduce energy consumption, and enhance hydration active effect

Inactive Publication Date: 2016-01-13
NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production of 1 ton of cement will emit about 1 ton of CO 2 , the pollution of the environment is quite serious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The percentages by weight of the curing agent: 43% of steel slag; 37% of slag; 10% of desulfurized gypsum; 3% of sulphoaluminate clinker, 2% of ordinary silicon cement clinker; 2% of aluminum slag; 3% of cement. The steel slag micropowder, slag micropowder and aluminum slag are ball milled to a specific surface area of ​​450m 2 / kg.

[0030] Take by weighing respectively 12%, 15% curing agent to prepare soft soil curing sample, when the water-cement ratio is 0.3 (ratio of water and curing agent): dry soil 700g, curing agent 115.1g, water 293.5g, mix And stir evenly to obtain the solidified soil specimen.

[0031] Stir evenly to prepare solidified soil specimens, and measure the unconfined compressive strength at 14d, 28d, and 60d ages.

[0032] Results: The unconfined compressive strengths of the solidified soil specimens 14d, 28d, and 60d with a mixing ratio of 12% were 725.5KPa, 1175.7KPa, and 1689.9KPa respectively; The confining compressive strengths are 1287KPa,...

Embodiment 2

[0034] The content of each component of the curing agent is changed, and others are the same as in Example 1. The weight percentages of the curing agent are: 40% of steel slag; 40% of slag; 10% of desulfurized gypsum; 3%; aluminum slag 2%.

[0035]Results: The unconfined compressive strengths of the solidified soil specimens with a mixing ratio of 12% at 14d, 28d and 60d were 819.5KPa, 1215.7KPa and 1579.9KPa respectively; The confined compressive strengths are 1342KPa, 2013.4KPa and 3011.1KPa respectively.

Embodiment 3

[0037] The content of each component of the curing agent is changed, and others are the same as in Example 1. The weight percentages of the curing agent are: 43% of steel slag; 35% of slag; 10% of desulfurized gypsum; 2.5%; aluminum slag 2%; cement 5%.

[0038] Results: The unconfined compressive strengths of the solidified soil specimens 14d, 28d, and 60d with a mixing ratio of 12% were 916.0KPa, 1527.7KPa, and 1938.6KPa respectively; The confined compressive strengths are 1123.2KPa, 1865.4KPa and 2769.1KPa respectively.

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Abstract

The invention discloses a soft soil curing agent prepared by means of industrial residues. The curing agent is prepared from, by weight, 35-65% of steel slag, 30-50% of mineral waste residues, 10-30% of desulfurization gypsum, 2-6% of sulphoaluminate cement clinker, 2-4% of ordinary portland cement clinker, 2-5% of aluminum dregs and 0-5% of cement. The sum of the weight percentages of all the components is 100%. The soft soil curing agent is prepared by fully utilizing industrial residues of heat-engine plants, steel works and aluminum electrolysis enterprises, unconfined compression strength is high during soft soil foundation reinforcement, waste is recycled, and economic benefits and environmental protection benefits are high.

Description

technical field [0001] The invention relates to the technical field of soft soil foundation treatment, and more specifically relates to an environment-friendly soft soil consolidation material that can widely replace cement for strengthening soft soil foundations, that is, a soft soil curing agent prepared from industrial waste residues. Background technique [0002] Weak foundation mainly refers to the foundation composed of silt, silty soil, flush fill soil, miscellaneous fill soil or other highly compressive soil layers. Soft soil is a kind of special soil, which has the characteristics of high water content, high compressibility, low shear strength and small consolidation coefficient. Under the action of external load, it takes a long time for compression and consolidation to be stable, and at the same time, large settlement and uneven deformation will occur. Therefore, manual treatment is required to change the structure of the foundation soil, improve the mechanical pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B18/14
CPCY02W30/91
Inventor 沈建生徐亦冬毛江鸿陆君
Owner NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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