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Application of single-molecule biquaternary ammonium salt in expansive soil modification

A double-quaternary ammonium salt, single-molecule technology, applied in the field of geotechnical engineering, can solve problems such as expansion and shrinkage deformation of expansive soil, and achieve the effects of reduced expansion, good durability, and simple and convenient construction

Inactive Publication Date: 2013-01-02
冯诚
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the above-mentioned defects, provide a kind of expansive soil modifier with good water solubility, convenient construction and high durability, which can effectively solve the problem of swelling and shrinking deformation of expansive soil, and reduce or eliminate the adverse effects of expansive soil on engineering to meet engineering needs

Method used

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  • Application of single-molecule biquaternary ammonium salt in expansive soil modification
  • Application of single-molecule biquaternary ammonium salt in expansive soil modification
  • Application of single-molecule biquaternary ammonium salt in expansive soil modification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Preparation of expansive soil modifier: Taking the preparation of 1000ml modifier as an example, the steps are as follows: (1) at room temperature, take 1 g of molecular deposition film flooding agent (MDFFA) at 0.1% by mass; (2) weigh A good molecular deposition film flooding agent is dissolved in 1000ml of water to obtain the expansive soil modifier of the present invention.

[0043] The steps of the improvement method are as follows: spray the prepared expansive soil modifier on the surface of dry expansive soil or expansive soil slope, and then spray the second time after the surface of the slope is dry, and repeat the spraying process until a surface with a certain thickness is formed. Improved layer. And ensure that the mass content of the monomolecular diquaternary ammonium salt in the expansive soil modifier is ≤0.5%.

Embodiment 2

[0045] Preparation of expansive soil modifier: Taking the preparation of 1000ml modifier as an example, the steps are as follows: (1) At room temperature, the mass of dry soil to be improved is 1000g, and the required molecular deposition film flooding agent ( MDFFA) 0.5g; (2) Dissolve the weighed molecular deposition film flooding agent in 1000ml water to obtain the expansive soil modifier of the present invention.

Embodiment 3

[0047] Preparation of expansive soil modifier: Taking the preparation of 1000ml modifier as an example, the steps are as follows: (1) at room temperature, the mass of dry soil to be improved is 1000g, and the required molecular deposition film flooding agent ( MDFFA) 0.1g; (2) dissolve the weighed molecular deposition film flooding agent in 1000ml water to obtain the expansive soil modifier of the present invention.

[0048] The steps of the improvement method are: spray the prepared improver on the dry expansive soil or the surface of the expansive soil slope, and then spray the second time after the surface of the slope is dry, and repeat this for several times until a surface improvement layer with a certain thickness is formed. . And ensure that the mass content of the monomolecular diquaternary ammonium salt in the expansive soil modifier is ≤0.5%.

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Abstract

The invention relates to an expansive soil modifying agent, which can reduce the swelling shrinkage, water sensitivity and dispersion of the swelling soil, falling into the technical field of geotechnical engineering. In the application of single-molecule biquaternary ammonium salt in expansive soil modification, the single-molecule biquaternary ammonium salt is composed of a first compound, and / or a second compound, wherein the first compound has the molecular formula of A1A2A3N<+>XnN<+>A4A5A6B<2->; and the second compound has the molecular formula of A1Py<+>XnPy<+>A2B<2->. The expansive soil modifying agent is formed by mixing the single-molecule biquaternary ammonium salt and water with the mass concentration of the single-molecule biquaternary ammonium salt as 0.001-0.5%. The inventive expansive soil modifying agent has good water solubility, convenient construction, and high durability, can effectively solve the swelling-shrinkage deformation problem of the expansive soil, and reduces or eliminates the bad effect of the expansive soil on the project to meet the project requirement.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering, and relates to an expansive soil modifier, in particular to an expansive soil modifier capable of reducing swelling and shrinkage, water sensitivity and dispersibility of expansive soil. Background technique [0002] Expansive soil refers to a super-consolidated clay containing strong hydrophilic clay mineral components, which has significant water absorption expansion, dehydration and shrinkage, and reversible expansion and contraction deformation. Its strong hydrophilic mineral components are mainly composed of montmorillonite and illite The liquid limit is mostly above 50%, and the proportion of clay (<2цm) is above 30%. The action of expansive soil and water will cause expansion and contraction deformation, and this deformation is repetitive, which will have adverse effects on buildings, especially light buildings, road bases, water channels and dams. Therefore, it is nec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/14E02D3/00C09K103/00
Inventor 冯诚
Owner 冯诚
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