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Bentonite waterproof carpet and manufacturing method thereof

A bentonite waterproof blanket and technology of bentonite, applied in the field of bentonite waterproof blanket, can solve the problems of sodium-based bentonite loss of characteristics, complex water quality and environment, etc.

Active Publication Date: 2009-08-26
捷高科技(苏州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, with the development of agricultural production and society, water pollution has become more and more serious, which has caused the water quality environment near some underground waterproofing projects to be quite complicated, and because the chemical substances in the sewage react with the sodium-based bentonite particles inside the waterproof blanket, when The cations in the pollutants undergo an ion exchange reaction with the sodium ions between the bentonite layers to replace the sodium ions between the layers, causing the sodium bentonite to lose its proper properties
Therefore, the existing common sodium bentonite waterproof blanket can no longer exert a good waterproof effect in complex water quality environments.

Method used

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  • Bentonite waterproof carpet and manufacturing method thereof
  • Bentonite waterproof carpet and manufacturing method thereof
  • Bentonite waterproof carpet and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Prepare the waterproof blanket of the present invention according to the following steps:

[0029] (1) Mix dry cationic polyacrylamide and anionic polyacrylamide with a weight ratio of 1:1.5 and fully stir for 2 minutes to prepare a primary mixture;

[0030] (2) According to the mass ratio of sodium bentonite: primary mixture=100:1.5, slowly add the primary mixture to the high expansive sodium bentonite particles with FS≥24ml / 2g, and fully stir for 10 minutes at room temperature. Make a bentonite mixture;

[0031] (3) Spread the bentonite mixture evenly on the bottom woven geotextile, the mass of the bentonite mixture per unit area is 3.75kg±0.25kg / m 2 , Spread a layer of polypropylene geotextile or non-woven fabric on the upper layer of the bentonite mixture, and composite the bottom geotextile with the surface geotextile or non-woven fabric by needle punching, and fix the bentonite mixture on the bottom layer Between the fabric and the surface fabric, make a waterproof bl...

Embodiment 2

[0037]The waterproof blanket is prepared according to the method of Example 1, wherein the weight ratio of cationic polyacrylamide to anionic polyacrylamide is 1:5; sodium-based bentonite particles: primary mixture=100:2; within a unit area of the waterproof blanket The mass of bentonite mixture is 4.0kg±0.25kg / m 2 .

[0038] Choose a water sample with a pH of 6.48 and a conductivity of 11.33ms / m. The water contains a large amount of nitrate, sulfate, magnesium ion, sodium ion, and calcium ion, of which sulfate is 428mg / L and nitrate is 30.2mg / L.

[0039] Take a sufficient amount of water samples and test them in accordance with the treatment method described in Example 1 to obtain permeability coefficients and flow indicators respectively. The results are shown in the following table:

[0040]

[0041] It can be seen that in a complex water environment, the waterproof blanket of the present invention still has a certain waterproof effect on the above-mentioned high-concent...

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Abstract

The invention relates to an anti-pollution type sodium bentonite waterproof carpet and a manufacturing method thereof. The manufacturing method is as follows that sodium bentonite, cationoid polyacrylamide powder and anionic polyacrylamide powder are well stirred to be made into bentonite mixture which is fixed between two layers of high strength geotextile to be made into the waterproof carpet. The invention has the advantages that the waterproof carpet can be used for waterproofing work in ground water engineering containing high concentration nitrate, phosphate, chloride, sulphate, carbonate and other organic solvent contamination and is applied to a plurality of complex water quality environment engineering by changing the proportion of the waterproof carpet.

Description

Technical field [0001] The invention belongs to the field of waterproof materials for construction, and particularly relates to a bentonite waterproof blanket suitable for waterproofing treatment in contaminated groundwater projects. Background technique [0002] Sodium-based bentonite waterproof blanket is a geosynthetic material that can be used in artificial lake waterscapes, landfills, underground garages, pools, oil depots, and chemical storage yards. It was mainly introduced to China by CETCO in the early 1990s. , And has been widely used and promoted in the Chinese construction industry. In addition to strong waterproof performance, it also has typical characteristics such as low temperature flexibility, resistance to freeze-thaw cycles, self-sealing, resistance to uneven settlement, and simple construction. [0003] At present, the common sodium bentonite waterproof blanket is widely used. The sodium bentonite, which is mainly used as a water barrier, has a flaky crystal ...

Claims

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Application Information

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IPC IPC(8): E02D31/02B32B5/16B32B5/30C04B26/04C04B14/12
Inventor 许延文汪一惠王云徐少辉
Owner 捷高科技(苏州)有限公司
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