Sealing against applied to bottom of deep flexible waterproof curtain, and preparation and pouring methods thereof

A technology of water-stop curtain and sealant, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., to achieve the effect of reducing dosage cost and good fluidity

Inactive Publication Date: 2020-08-18
ZHONGKE DINGSHI ENVIRONMENTAL ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on the above-mentioned shortcomings in the prior art, the present invention provides a sealant for the bottom of the deep flexible water-stop curtain and its preparation and pouring method, which can realize the filling of the sealant to the soil cracks and the complete filling of the bottom of the flexible water-stop curtain , effectively block groundwater, solve the problem of leakage of contaminated media under the flexible water-stop curtain, suitable for the bottom sealing of flexible water-stop curtains at 0-40m or deeper, especially suitable for the bottom sealing of deep flexible water-stop curtains at 20-40m or deeper , and the sealant material is easy to obtain, and the sealant preparation and filling method are easy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The sealant of the present embodiment is made up of the modified bentonite of 60% by weight and the local clay of 40% by weight, and the preparation method is as follows:

[0028] (1) adding sodium-based bentonite and water to a stirring tank according to a weight ratio of 1:15 to obtain sodium-based bentonite slurry;

[0029] (2) Add 2% weight of polyionic cellulose to the sodium-based bentonite slurry obtained in step (1), heat to 80° C., stir for 8 hours using a high-speed stirring device, and the rotating speed is 2000r / min to obtain the modified bentonite slurry;

[0030] (3) drying the modified bentonite slurry obtained in step (2) for 14h, pulverizing, and crossing 80 mesh sieves to obtain modified bentonite;

[0031] (4) Mix the modified bentonite obtained in step (3) with the local clay that has passed through an 80-mesh sieve, and stir thoroughly to obtain the product.

[0032] According to the variable water head penetration test (GBT 50123-2019 geotechnical...

Embodiment 2

[0042] The sealant of the present embodiment is made up of the modified bentonite of 80% by weight and the local clay of 20% by weight, and the preparation method is as follows:

[0043] (1) adding sodium-based bentonite and water to a stirring tank according to a weight ratio of 1:10 to obtain sodium-based bentonite slurry;

[0044] (2) Add 0.5% by weight polyionic cellulose to the sodium-based bentonite slurry obtained in step (1), heat to 60° C., stir for 5 hours using a high-speed stirring device, and the rotating speed is 1500 r / min to obtain the modified bentonite slurry;

[0045] (3) drying the modified bentonite slurry obtained in step (2) for 10h, pulverizing, and crossing 80 mesh sieves to obtain modified bentonite;

[0046] (4) Mix the modified bentonite obtained in step (3) with the local clay that has passed through an 80-mesh sieve, and stir thoroughly to obtain the product.

[0047] According to the variable water head penetration test (GBT 50123-2019 geotechni...

Embodiment 3

[0057] The sealant of the present embodiment is made up of the modified bentonite of 70% by weight and the local clay of 30% by weight, and the preparation method is as follows:

[0058] (1) adding sodium-based bentonite and water to a stirring tank according to a weight ratio of 1:13 to obtain sodium-based bentonite slurry;

[0059] (2) Add 1% weight of polyionic cellulose to the sodium-based bentonite slurry obtained in step (1), heat to 70° C., stir for 7 hours using a high-speed stirring device, and the rotating speed is 1800r / min to obtain the modified bentonite slurry;

[0060] (3) drying the modified bentonite slurry obtained in step (2) for 12h, pulverizing, and crossing 80 mesh sieves to obtain modified bentonite;

[0061] (4) Mix the modified bentonite obtained in step (3) with the local clay that has passed through an 80-mesh sieve, and stir thoroughly to obtain the product.

[0062] According to the variable water head penetration test (GBT 50123-2019 geotechnical...

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Abstract

The invention discloses a sealing against applied to the bottom of a deep flexible waterproof curtain, and preparation and pouring methods thereof. The sealing agent comprises modified bentonite and clay, wherein the modified bentonite is sodium bentonite modified by polyionic cellulose. The sealing agent applied to the bottom of the deep flexible waterproof curtain and the preparation and pouringmethods thereof can realize filling of soil cracks with the sealing agent and complete filling of the bottom of the flexible waterproof curtain, effectively block underground water, solve the problemof leakage of a polluted medium below the flexible waterproof curtain, are suitable for sealing the bottom of the flexible waterproof curtain which is 0-40m deep or deeper, and are especially suitable for sealing the bottom of the deep flexible waterproof curtain which is 20-40 m deep or deeper. The materials of the sealing against are easy to obtain, and the preparation and pouring methods of the sealing agent are convenient and easy.

Description

technical field [0001] The invention relates to a sealant for the bottom of a deep flexible water-stop curtain and a preparation and pouring method thereof, belonging to the field of flexible water-stop curtains. Background technique [0002] Barrier technology is a technology that uses engineering measures such as blocking, intercepting, and covering to control the migration of pollutants or block the exposure of pollutants, to isolate the polluted medium from the surrounding environment, and to reduce and eliminate the risks of pollutants to human health and the environment. Barrier technology includes two categories: horizontal barrier and vertical barrier. [0003] Vertical flexible waterproof curtain is one of the important technologies of vertical barrier. The current vertical flexible water-stop curtain has problems such as low sealing degree between the curtain and the soil layer and rock layer, and the leakage of polluted medium is easy to occur, so the bottom need...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D19/18E02D19/16E02D15/00C01B33/44
CPCC01B33/44E02D15/00E02D19/16E02D19/18
Inventor 张文王博艺张景鑫邱二营李大伟李忠博董洋孙镭吴伟佳杨勇王海东殷晓东
Owner ZHONGKE DINGSHI ENVIRONMENTAL ENG CO LTD
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