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Preparation method and application of viscous anti-seepage material

An anti-seepage material and sticky technology, which is applied in the field of preparation of environmental protection materials, can solve the problems of secondary pollution of the environment, difficulty in making up for it, increase of leachate, etc., and achieve secondary pollution, no secondary pollution, and convenient construction Effect

Active Publication Date: 2014-03-26
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the LDPE film layer is usually spliced ​​by countless pieces of small LDPE films, it is not only easily damaged by stress concentration, but also easily pierced by the roots of the ecological restoration system, so that the entire anti-seepage system will be damaged during the later operation of the landfill. It is damaged and it is difficult to make up for it, which leads to the collapse of the self-defense system of the entire landfill, the increase of leachate, and secondary pollution to the environment

Method used

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  • Preparation method and application of viscous anti-seepage material

Examples

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Comparison scheme
Effect test

Embodiment 1

[0016] 1 kg of fly ash, 30 kg of kaolin, 80 kg of bentonite, 2 kg of polyacrylic acid, 2 kg of polyacrylamide, 1 kg of polyacrylate and 2 kg of cetyltrimethylammonium chloride are used as raw materials, fully stirred and mixed After uniformity, the anti-seepage material will be obtained, with a density of 1.15g / cm 3 .

Embodiment 2

[0018] 2 kg of fly ash, 60 kg of kaolin, 40 kg of bentonite, 1 kg of polyacrylic acid, 2 kg of polyacrylate and 2 kg of cetyltrimethylammonium chloride are used as raw materials. Material with a density of 1.20g / cm 3 .

Embodiment 3

[0020] 5 kg of fly ash, 40 kg of kaolin, 50 kg of bentonite, 2 kg of polyacrylic acid, 2 kg of polyacrylamide and 2 kg of cetyltrimethylammonium chloride are used as raw materials, and the anti-seepage can be obtained after fully stirring and mixing uniformly. Material with a density of 1.18g / cm 3 .

[0021] Use of viscous barrier materials such as figure 1 As shown, on the surface of the waste layer 4 to be treated in the landfill, a 10-20cm thick clay layer is laid, and the clay layer has a moisture content of 20-23%, and it is rolled and compacted three times back and forth to obtain the bottom compacted clay layer 3; Then lay the anti-seepage material 2 of the present invention with a thickness of 2-3cm, and finally lay a 10-20cm thick clay layer with a moisture content of 20-23%, and roll and compact it back and forth three times to obtain the top compacted clay layer 1. The permeability coefficient of this "sandwich" viscous anti-seepage system is 1×10 -10 cm / s.

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Abstract

The invention discloses a preparation method and an application of a viscous anti-seepage material. The preparation method adopts the following raw materials in part by weight: 0-5 parts of coal ash, 30-60 parts of kaolinite, 40-80 parts of bentonite, 1-3 parts of polyacrylic acid, 0-3 parts of polyacrylamide, 0-3 parts of polyacryl acid ester and 0-2 parts of hexadecyl trimethyl ammonium chloride, the raw materials are fully mixed to obtain the anti-seepage material with the 1.15-1.20 g / cm<3>. The viscous anti-seepage material is mainly used for a 'sandwich'-type anti-seepage system. The invention has the advantages that the anti-seepage performance and the self-recovery function are excellent, the structure is simple, the price is low, the construction is convenient and secondary pollution can not be caused to the environment.

Description

technical field [0001] The invention relates to a preparation method of an environmental protection material, in particular to a preparation method of a viscous anti-seepage material and its application. Background technique [0002] With the acceleration of my country's urbanization process and rapid economic growth, the amount of municipal waste, industrial solid waste and various mine solid wastes is increasing day by day. Municipal waste landfill is still the main way of waste disposal in my country. Due to the presence of various harmful components (such as organic pollutants, heavy metals, etc.) in industrial solid waste and mine solid waste, landfill disposal has become the main disposal method for these two types of solid waste. [0003] Regardless of whether it is an urban waste landfill, industrial solid waste, or mine solid waste landfill, surface anti-seepage coverage and ecological restoration are required after the site is closed. [0004] At present, the com...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/06E02D31/00
Inventor 刘阳生
Owner PEKING UNIV
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