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Soil curing agent suitable for salinized soil

A soil curing agent and saline soil technology, which is applied in soil protection, construction, infrastructure engineering, etc., to achieve the effects of convenient construction, environmental protection, and great development potential

Inactive Publication Date: 2006-03-08
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the effect of simply using cement is often not as good as that of combined curing agents. The finer the soil particles, the more obvious this defect of cement is.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Qinghai Golmud native clay saline soil, sulfate-chloride content is 4%, add curing agent according to 10% of dry soil weight of saline soil. The curing agent contains the following components: 1 part of ordinary Portland cement, 1.5 parts of high-calcium fly ash, 2 parts of water-quenched blast furnace slag, 1 part of calcined coal gangue powder, 0.5 parts by weight of slaked lime and FDN high-efficiency water reducer (mainly The composition is 0.01 parts of β-naphthalenesulfonic acid formaldehyde condensate sodium salt). After adding the curing agent, stir evenly, adjust the water consumption to the optimum moisture content of the soil mixture, and then compact it after stirring evenly, until the degree of compaction reaches the maximum dry density of the soil mixture, and seal it with a plastic film for health preservation. The 7-day unconfined compressive strength is 4.4MPa, the 28-day unconfined compressive strength is 7.0MPa, and the 120-day unconfined compressive ...

Embodiment 2

[0019] The original sandy saline soil in Golmud, Qinghai, the sulfate-chloride content is 3.6%, and the curing agent is added according to 15% of the weight of the dry soil of the saline soil. The curing agent contains the following components: 1 part of ordinary Portland cement, 2 parts of fly ash, 3 parts of water-quenched blast furnace slag, 1 part of metakaolin, 0.1 part of NaOH, 1.5 parts of slaked lime and water-soluble SM type melamine The composition of 0.1 part of water agent. After adding the curing agent, stir evenly, adjust the water consumption to the optimum moisture content of the soil mixture, and then compact it after stirring evenly, until the degree of compaction reaches the maximum dry density of the soil mixture, and seal it with a plastic film for health preservation. The 7-day unconfined compressive strength is 5.8MPa, the 28-day unconfined compressive strength is 9.5MPa, and the 90-day unconfined compressive strength is 11.4MPa. The 28-day water stabil...

Embodiment 3

[0021] For sandy soil in Beijing (non-saline soil), add sodium sulfate and sodium chloride at a ratio of 1:1 to make the soluble salt content of the soil 6%, and add a curing agent according to 20% of the dry soil weight of the saline soil. The curing agent contains the following components: 1 part of ordinary Portland cement, 2 parts of fly ash, 2.5 parts of water-quenched blast furnace slag, 1 part of a mixture of calcined coal gangue powder and magnesium slag (the mixing ratio is not required), quicklime powder 1 part, light-burned magnesite powder (the main component is MgO, which is Mg(OH)2 after hydration) 0.3 part and FDN superplasticizer (the main component is β-naphthalenesulfonic acid formaldehyde condensate sodium salt) 0.02 share. After adding the curing agent, stir evenly, adjust the water consumption to the optimum moisture content of the soil mixture, and then compact it after stirring evenly, until the degree of compaction reaches the maximum dry density of the...

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Abstract

An earth curing agent used in curing salinized soil with heavy salt is manufactured by ordinary silicate cement, water quenched blast furnace slag, fly-ash, active mineral doped material, lime hydroxides of alkali metal or alkali earth metal and chemical dispersing agent in proper proportion. The middle and strong salinized soil of sulfate can be cured effectively by doping 8%-12% earth curing agents.

Description

technical field [0001] The invention relates to a high-efficiency soil curing agent suitable for saline soil, which also has excellent curing effect on saline soil with high salt content. Background technique [0002] At present, there are many kinds of soil curing agents used for non-saline soil at home and abroad, but for the curing of saline soil, especially saline soil with high salt content (such as saline soil distributed in the inland salt lake area of ​​Northwest my country) Drugs are rare. Some soil stabilizers used for non-saline soil can also produce a certain curing effect on saline soil with low salt content. Some curing agents are very sensitive to salt content. For example, the ionic soil curing agent with good effect in non-saline soil will be greatly reduced in saline soil. It can hardly even play a curing role. Cement is often used for soil stabilization and is the most widely used soil stabilizer. But simply using cement, the effect is often not as good...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/12
Inventor 阎培渝周永祥
Owner TSINGHUA UNIV
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