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Expansive soil modifier, its preparation and application and method for using it to improve expansive soil

The technology of soil conditioner and expansive soil is applied in the field of expansive soil conditioner, which can solve the problems of insufficient compressive strength of expansive soil, difficult fiber and expansive soil particles, etc., and achieve the effect of excellent effect, less environmental pollution and improved strength.

Active Publication Date: 2021-03-23
INNER MONGOLIA AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using fiber or fly ash fiber can enhance the shear performance of expansive soil, but in the modified expansive soil, it is difficult for the fiber and expansive soil particles to form a solidified whole, which makes it insufficient in improving the compressive strength of expansive soil

Method used

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  • Expansive soil modifier, its preparation and application and method for using it to improve expansive soil
  • Expansive soil modifier, its preparation and application and method for using it to improve expansive soil
  • Expansive soil modifier, its preparation and application and method for using it to improve expansive soil

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Embodiment 1

[0058] This embodiment provides an expansive soil modifier, wherein, based on the total weight of the dry expansive soil to be improved by the expansive soil modifier as 100%, it includes coal gangue and polypropylene fiber, and the specific amounts of the two are as follows 1 shown;

[0059] In this embodiment, the expansive soil modifier can be obtained by mixing the coal gangue and polypropylene fiber according to the required ratio in Table 1.

Embodiment 2

[0061] This embodiment provides an expansive soil modifier, wherein, based on the total weight of the dry expansive soil to be improved by the expansive soil modifier as 100%, it includes coal gangue, polypropylene fiber and cationic emulsified asphalt, the three The specific dosage is shown in Table 1 below;

[0062] In this embodiment, the expansive soil modifier can be obtained by mixing the coal gangue, polypropylene fiber and cationic emulsified asphalt according to the required ratio in Table 1.

Embodiment 3

[0064] This embodiment provides an expansive soil modifier, wherein, based on the total weight of the dry expansive soil to be improved by the expansive soil modifier as 100%, it includes coal gangue, polypropylene fiber and cement, and the specific amounts of the three are As shown in Table 1 below;

[0065] In this embodiment, the expansive soil modifier can be obtained by mixing the coal gangue, polypropylene fiber and cement according to the required ratio in Table 1.

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Abstract

The invention provides an expansive soil modifier, a preparation and application thereof and a method for modifying expansive soil using the same. The expansive soil modifier comprises the following components: 3-12% of coal gangue and 0.2-0.6% of polypropylene fiber, based on the total weight of the dry expansive soil to be modified being 100%. The invention also provides a preparation method ofthe expansive soil modifier and the application of the expansive soil modifier in the improvement of the expansive soil. The invention also provides a method for improving expansive soil by utilizingthe expansive soil modifier, the improved expansive soil obtained by the method and the application of the improved expansive soil in expansive soil roadbed filling engineering. The method provided bythe invention has the advantages of simple treatment, low cost, excellent effect, small environmental pollution, lime saving and the like, and the mechanical and engineering properties of the obtained improved expansive soil are good, and the swelling and shrinkage rates are suppressed.

Description

technical field [0001] The invention relates to an expansive soil improver, its preparation and application and a method for improving expansive soil by using the same, belonging to the technical field of civil engineering materials. Background technique [0002] Expansive soil contains hydrophilic minerals montmorillonite and illite, which have the characteristics of significant water absorption, water loss shrinkage, and repeated expansion and contraction deformation in the external environment of alternating dry and wet conditions, which often cause severe damage to engineering structures and roadbeds. Therefore, it is necessary to improve the expansive soil to reduce the expansion and contraction. [0003] Coal gangue is a solid waste with very low carbon content in coal mines and its main components are silica and alumina. In the prior art, there has been research on the use of coal gangue for modifying expansive soil. The technical scheme is: crush the coal gangue and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/40E01C3/00C09K103/00
CPCC09K17/40C09K2103/00E01C3/00
Inventor 张雁王明磊陈向前朱红星高树增张楠
Owner INNER MONGOLIA AGRICULTURAL UNIVERSITY
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