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Method for improving swelled ground by waste tire glue powder

A technology for waste tires and expansive soil, applied in the field of geotechnical engineering, can solve problems such as expansion and contraction deformation and damage of expansive soil, and achieve the effects of improving engineering properties, reducing liquid limit, and improving interface conditions

Inactive Publication Date: 2009-04-22
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Technical problem: The present invention overcomes the deficiencies of the prior art and provides a method for improving expansive soil by using waste tire rubber powder, which effectively improves the strength of expansive soil and solves the problems of expansive soil expansion, shrinkage, deformation and damage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Firstly, the waste tire materials are coarsely crushed by dry method at room temperature to obtain 5-10 mesh coarse rubber powder; then finely crushed by air turbo expansion refrigeration crushing method to obtain 20 mesh fine rubber powder ; Mix the prepared fine rubber powder with expansive soil, add water at the same time, and stir well with a machine. The mass percentage ratio of the added fine rubber powder, expansive soil and water is: fine rubber powder 10%; expansive soil 70% 20% water to prepare rubber powder-expansive soil material; spread the prepared rubber powder-expansive soil material on the surface of the soil to be solidified to form a 20-80cm surface improvement layer, and spray water to make it fully infiltrated After the surface is dry, spray water for the second time to make the rubber powder and expansive soil fully cohere, and repeat drying and spraying 2-3 times to fully infiltrate and achieve the improvement effect.

[0025] Consolidation fast s...

Embodiment 2

[0028] Firstly, the waste tire materials are coarsely crushed by dry method at room temperature to obtain 5-10 mesh coarse rubber powder; then finely crushed by air turbo expansion refrigeration crushing method to obtain 20 mesh fine rubber powder ; Mix the prepared fine rubber powder with expansive soil, add water at the same time, and stir well with a machine. The mass percentage ratio of the added fine rubber powder, expansive soil and water is: fine rubber powder 20%; expansive soil 60% 20% water to prepare rubber powder-expansive soil material; spread the prepared rubber powder-expansive soil material on the surface of the soil to be solidified to form a 20-80cm surface improvement layer, and spray water to make it fully infiltrated After the surface is dry, spray water for the second time to make the rubber powder and expansive soil fully cohesive, repeat drying and spraying to fully infiltrate and achieve the improvement effect.

[0029] Consolidation fast shear test, u...

Embodiment 3

[0032]Firstly, the waste tire materials are coarsely crushed by dry method at room temperature to obtain 5-10 mesh coarse rubber powder; then finely crushed by air turbo expansion refrigeration crushing method to obtain 20 mesh fine rubber powder ; Mix the prepared fine rubber powder with expansive soil, add water at the same time, fully stir evenly, the mass percentage ratio of the added fine rubber powder, expansive soil and water is: fine rubber powder 30%; expansive soil 50%; water 20% to obtain the rubber powder-expansive soil material; spread the prepared rubber powder-expansive soil material on the surface of the soil to be solidified to form a 20-80cm surface improvement layer, and spray water to make it fully infiltrated. After the surface is dry, spray water for the second time to fully cohere the rubber powder and expansive soil. Repeat drying and spraying 2-3 times to fully infiltrate and achieve the improvement effect.

[0033] Consolidation fast shear test, uncon...

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PUM

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Abstract

The invention discloses a method for improving expansive soil with scrap tire rubber powder. The method comprises the following steps: coarsely crushing scrap tire rubber powder material by a normal-temperature crushing method; finely crushing obtained coarse rubber powder by an air turbine refrigeration crushing method; mixing obtained fine rubber powder with expansive soil; adding water into the mixture with even stirring to make improved expansive soil material; spreading the expansive soil material on surface of soil to be solidified, spraying water to fully soak the expansive soil material to form a surface improved layer. Expansive soil improved by the method has the characteristics of high strength, small expansive deformation, lightness, durability, good elasticity, good water permeability and so on, improves pavement deformation and drainage conditions, contributes to the stability of roadbeds and can be widely used in the fields such as hydraulic work, construction, transportation, subway, tunnel, bank, refuse landfill and so on.

Description

1. Technical field [0001] The invention belongs to the technical field of geotechnical engineering, in particular to a method for improving expansive soil by using waste tire rubber powder. 2. Background technology [0002] The existing methods of improving expansive soil mainly include: compaction method, physical improvement method, chemical improvement method, moisture retention method, soil replacement method and biological improvement method. [0003] (1) The tamping method is to compact the expansive soil to the required density. After tamping, the foundation density of the expansive soil will increase, the cohesion and internal friction angle will also increase, and the bearing capacity of the foundation will increase. Although the compaction method is low in cost, it has certain The applicability limit is generally only applicable to weak expansive soil foundations. [0004] (2) Physical modification methods include soil nailing walls, pile foundations, adding geote...

Claims

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Application Information

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IPC IPC(8): E02D3/00C09K17/40C09K103/00
Inventor 孙树林魏永耀张鑫
Owner HOHAI UNIV
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