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Bentonite modified sand soil material replacing clay liner of refuse landfill and preparation method of bentonite modified sand soil material

A technology of landfill and bentonite, which is applied in protection devices, buildings, infrastructure engineering, etc., can solve the problems of difficulty in finding and satisfying clay, high transportation and construction costs, and difficulty in clay procurement, and achieve a favorable ecological environment. Conservation, Applicability Obvious, Earthwork Balance Effect

Inactive Publication Date: 2014-04-16
WUXI MUNICIPAL DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention is precisely to overcome the potential environmental hazards caused by the difficulty in clay procurement, high transportation and construction costs, and even difficulty in finding clay that meets the design requirements when building solid waste landfills in areas where clay resources are scarce.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The preparation method of the bentonite modified sand material that replaces the clay liner of the landfill site, the steps are as follows:

[0021] (1) Ingredients: 82.5 parts of silty sand, 2 parts of bentonite and 12.5 parts of water;

[0022] (2) Stirring: Add the silty sand and bentonite described in step (1) into the self-falling drum concrete mixer and stir evenly. The mixing mode is intermittent operation, mobile installation, and the discharging mode is self-falling;

[0023] (3) Rolling: The transport vehicle unloads the material mixed in step (2) to the construction work surface of the landfill reservoir area, manually paves to 20cm, and then sprinkles the prepared water evenly on the surface of the material until there is no obvious water on the surface After staining, use a vibratory roller with a working mass of not less than 10t to roll over 3 times, take samples to measure the degree of compaction and permeability coefficient, and the material needs to b...

Embodiment 2

[0028] The preparation method of the bentonite modified sand material that replaces the clay liner of the landfill site, the steps are as follows:

[0029] (1) Ingredients: 85.5 parts of silty sand, 5 parts of bentonite and 12.5 parts of water;

[0030] (2) Stirring: Add the silty sand and bentonite described in step (1) into the self-falling drum concrete mixer and stir evenly. The mixing mode is intermittent operation, mobile installation, and the discharging mode is self-falling;

[0031] (3) Rolling: the transport vehicle unloads the material mixed in step (2) to the construction work surface of the landfill reservoir area, manually paves to 10cm, and then sprinkles the prepared water evenly on the surface of the material until there is no obvious water on the surface After staining, use a vibratory roller with a working mass of not less than 10t to roll over 3 times, take samples to measure the degree of compaction and permeability coefficient, and the material needs to b...

Embodiment 3

[0036] The preparation method of the bentonite modified sand material that replaces the clay liner of the landfill site, the steps are as follows:

[0037] (1) Ingredients: 84 parts of silty sand, 4 parts of bentonite and 12.5 parts of water;

[0038] (2) Stirring: Add the silty sand and bentonite described in step (1) into the self-falling drum concrete mixer and stir evenly. The mixing mode is intermittent operation, mobile installation, and the discharging mode is self-falling;

[0039] (3) Rolling: The transport vehicle unloads the material mixed in step (2) to the construction work surface of the landfill reservoir area, manually paves to 15cm, and then sprinkles the prepared water evenly on the surface of the material until there is no obvious water on the surface After staining, use a vibratory roller with a working mass of not less than 10t to roll over 3 times, take samples to measure the compaction degree and permeability coefficient, and the material needs to be rol...

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Abstract

The invention relates to a bentonite modified sand soil material replacing a clay liner of a refuse landfill and a preparation method of the bentonite modified sand material, and belongs to the technical field of solid waste retreatment. The bentonite modified sand soil material comprises the following components by weight: 82.5-85.5 parts of silty sand, 2-5 parts of bentonite and 12.5 parts of water. The preparation method comprises the following steps: uniformly mixing the silty sand and the bentonite and then laying on a to-be-constructed working face, uniformly spraying water on the surface of a material, carrying out rolling-compaction to obtain the bentonite modified sand soil material replacing the clay liner of the refuse landfill. The bentonite modified sand soil material is subjected to the modification treatment through addition of bentonite and water, so that the problems of difficult clay purchasing and large transportation and construction cost due to clay resource shortage are solved, and meanwhile, soil can be used on the spot, the earthwork balance is achieved on the spot, so that the problem that an excavation party spoils soil difficultly is solved, and the ecological environment protection is facilitated. Since the technology is simple in construction, and the material source is wide, the technology applicability is relatively wide, and the implementation is easy.

Description

technical field [0001] The invention relates to a bentonite modified sand material which can replace the clay liner of a landfill site and a preparation method thereof, and belongs to the technical field of solid waste reprocessing. Background technique [0002] During the construction of solid waste landfill, it is required that there must be a clay protective layer not less than 75cm thick under the HDPE geomembrane anti-seepage layer at the bottom of the reservoir and on the slope. There are also specific requirements for the permeability coefficient, and the construction requirements for the clay anti-seepage protective layer are extremely strict. , that is, the soil quality is required to be uniform, without sharp objects, etc., to prevent the anti-seepage layer of HDPE geomembrane from being punctured when the garbage is landfilled. In my country's Huanghuaihai Plain and coastal areas, due to the erosion of large rivers such as the Yellow River and the Yangtze River, t...

Claims

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Application Information

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IPC IPC(8): C04B33/04E02D31/02
Inventor 耿震
Owner WUXI MUNICIPAL DESIGN INST
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