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Dechlorinated alkali residue solidified soil for road engineering

A technology for road engineering and solidified soil, which is applied in the field of solidified soil with dechlorinated alkali slag for road engineering, can solve the problems of environmental and durability impact, dechlorination pretreatment of industrial alkali slag, etc., and achieve the goal of reducing cost, eliminating pollution, and reducing pollution Effect

Inactive Publication Date: 2015-11-18
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 patent application documents disclose "the formula for preparing building materials and their products using alkali slag (201410331432.0)" and "a sludge solidification material for comprehensive utilization of alkali slag (201310247152.7)", both of which involve the resource utilization of alkali slag, but neither The slag is subjected to dechlorination pretreatment, and the high content of chloride (CaCl 2 , NaCl) will have a certain degree of impact on the environment and durability of coastal road projects in the later stage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The silty clay to be consolidated is dried, ground and screened to obtain dry soil with a particle size of less than 2 mm for later use. Percentage by weight: 8% curing agent, 55% dry soil, and 37% water. Put the above-mentioned raw materials into a mixer and stir evenly to obtain a mixed soil sample, and compact to obtain a solidified soil with dechlorinated alkali slag for road engineering.

[0027] Wherein, the weight percent composition of the curing agent is 12% desulfurized gypsum, 30% dechlorinated alkali slag, 30% fly ash, 23% slag, and 5% activator;

[0028] The desulfurization gypsum is power plant flue gas desulfurization gypsum, wherein the sulfur trioxide content is 35% to 45%;

[0029] The specific surface area of ​​the alkali dechlorination slag produced in the process of making alkali by ammonia-soda method is 400m 2 Alkali slag above / kg is pretreated by electrolytic dechlorination; the specific pretreatment method is: mix alkali slag and water at a we...

Embodiment 2

[0038] The silty clay to be consolidated is dried, ground and screened to obtain dry soil with a particle size of less than 2 mm for later use. Percentage by weight: 10% curing agent, 50% dry soil, and 40% water. Put the above-mentioned raw materials in a blender and stir evenly to obtain a mixed soil sample, and compact it to obtain the soil solidified with dechlorinated alkali slag for road engineering.

[0039] Wherein, the weight percent composition of the curing agent is 12% desulfurized gypsum, 30% dechlorinated alkali slag, 30% fly ash, 23% slag, and 5% activator;

[0040] The desulfurization gypsum is power plant flue gas desulfurization gypsum, wherein the sulfur trioxide content is 35% to 45%;

[0041] The specific surface area of ​​the alkali dechlorination slag produced in the process of making alkali by ammonia-soda method is 400m 2 Alkali slag above / kg is pretreated by electrolytic dechlorination; the specific pretreatment method is: mix alkali slag and water a...

Embodiment 3

[0047] The silty clay to be consolidated is dried, ground and screened to obtain dry soil with a particle size of less than 2 mm for later use. Percentage by weight: 12% curing agent, 50.5% dry soil, 37.5% water, put the raw materials in the above mixing ratio into a mixer and stir evenly to obtain a mixed soil sample, and compact it to obtain the solidified soil with dechlorinated alkali slag for road engineering.

[0048] Wherein, the weight percent composition of the curing agent is 15% desulfurized gypsum, 30% dechlorinated alkali slag, 27% fly ash, 21% slag, and 7% activator;

[0049] The desulfurization gypsum is power plant flue gas desulfurization gypsum, wherein the content of sulfur trioxide is 35%;

[0050] The specific surface area of ​​the alkali dechlorination slag produced in the process of making alkali by ammonia-soda method is 400m 2 Alkali slag above / kg is pretreated by electrolytic dechlorination; the specific pretreatment method is: mix alkali slag and w...

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Abstract

The invention discloses dechlorinated alkaline residue solidified soil for road engineering. The dechlorinated alkaline residue solidified soil comprises components in percentage by weight as follows: 8%-20% of a curing agent, 45%-55% of dry soil and 35%-40% of water, wherein the curing agent comprises components as follows: flue gas desulfurization gypsum, dechlorinated alkaline residues, coal powder ash, slag and an activator; the dry soil is obtained by grinding dried silt clay. According to the dechlorinated alkaline residue solidified soil for road engineering, the alkaline residue pretreatment technology is effectively developed, the silt clay with poor engineering properties is improved into engineering construction soil, and sustainable resource utilization is realized.

Description

technical field [0001] The invention relates to a soil solidified with dechlorinated alkali slag for road engineering. Background technique [0002] At present, there are a large amount of silty clay in the strata of coastal cities in my country. These silty clays have problems such as high water content, high clay content, poor drainage, and low strength. It is difficult to meet the needs of engineering construction and needs to be reinforced. For silty clay with high water content, the traditional reinforcement method requires a relatively large amount of curing agent, and the cost is also high, and the ideal curing effect is often not achieved. [0003] In recent years, due to the accumulation of a large number of industrial waste residues, the environment has been polluted. The alkali residue curing agent has been widely used due to the resource utilization of industrial waste residues. The patent application documents disclose "the formula for preparing building materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14
Inventor 潘崇根谢新宇李卓明郑凌逶邹圣峰
Owner NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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