Impervious geosynthetic clay liner

A technology of bentonite waterproof blanket and bentonite, applied in geotextiles, water conservancy projects, protective devices, etc., can solve the problems of poor impermeability and other problems, and achieve the effects of good viscosity and elasticity, good bonding, and large specific surface area

Active Publication Date: 2018-02-09
广州腾飞建筑工程材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem mainly solved by the present invention is: aiming at the problem of poor impermeability of traditional bentonite waterproof blanket, a kind of impermeable bentonite waterproof blanket is provided

Method used

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  • Impervious geosynthetic clay liner

Examples

Experimental program
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Effect test

example 1

[0026]Pour sodium-based bentonite into a pulverizer, and pass through a 325-mesh sieve after crushing to obtain sodium-based bentonite powder. Mix 10% sulfuric acid solution with a mass fraction of 8% hydrochloric acid at a volume ratio of 1:3 to obtain a mixed acid solution , and then mix the sodium-based bentonite powder and the mixed acid solution according to the mass ratio of 1:30 and pour them into the reaction kettle. Under the conditions of temperature of 55°C and rotation speed of 600r / min, stir and react at a constant temperature for 4 hours, and filter to obtain a filter cake. And wash the filter cake with deionized water until the washing liquid is neutral, then transfer the washed filter cake to an oven, and dry it to a constant weight at a temperature of 110°C to obtain acid-leached bentonite, and then mix the acid-leached bentonite with the mass The fraction of 10% silver nitrate solution is mixed according to the mass ratio of 1:50 and poured into the beaker, an...

example 2

[0028] Pour sodium-based bentonite into a pulverizer, and pass through a 325-mesh sieve after crushing to obtain sodium-based bentonite powder. Mix 10% sulfuric acid solution with a mass fraction of 8% hydrochloric acid at a volume ratio of 1:3 to obtain a mixed acid solution , and then mix the sodium-based bentonite powder and the mixed acid solution according to the mass ratio of 1:30 and pour them into the reaction kettle. Under the conditions of temperature of 55°C and rotation speed of 600r / min, stir and react at a constant temperature for 4 hours, and filter to obtain a filter cake. And wash the filter cake with deionized water until the washing liquid is neutral, then transfer the washed filter cake to an oven, and dry it to a constant weight at a temperature of 110°C to obtain acid-leached bentonite, and then mix the acid-leached bentonite with the mass The fraction of 10% silver nitrate solution is mixed according to the mass ratio of 1:50 and poured into the beaker, a...

example 3

[0030] Then in parts by weight, successively take 100 parts of sodium bentonite, 20 parts of binder, and 40 parts of water, stir and mix with a mixer at a speed of 800 r / min for 60 minutes to obtain a bentonite mixture, and then transfer the bentonite mixture to vacuum kneading Extruder, after vacuum kneading for 30 minutes, extrude to obtain a bentonite layer; pour agar, gluten powder and water into a beaker with a mass ratio of 10:3:100, stir and mix with a glass rod for 20 minutes, and let it stand for swelling 4h, then move the beaker into a digital speed measuring constant temperature magnetic stirrer, at a temperature of 95°C and a speed of 400r / min, stir and dissolve at a constant temperature for 5h, then cool naturally to room temperature to obtain a mixed solution; Take 30 parts of the mixed solution preheated to 80°C and 80 parts of the organic solvent at the temperature of 25°C, and spray the mixed solution into the beaker containing the organic solvent through the s...

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Abstract

The invention discloses an impervious geosynthetic clay liner, and belongs to the technical field of waterproof coiled materials. The impervious geosynthetic clay liner comprises a woven cloth layer (1), a buffer layer (4), a bentonite layer (2), a buffer layer (4) and a non-woven cloth layer (3) from top to bottom, wherein the bentonite layer consists of the following raw materials of, by weight,80-100 parts of modified bentonite, 10-20 parts of adhesive, and 30-40 parts of water; the adhesive is formed by mixing polyvinyl alcohol solution and water glass; the buffer layer is mixed liquid prepared by dissolving agar and vital gluten into the water; and the mixed liquid is preheated to spray into organic solvent for standing and layering to prepare gel beads. The impervious geosynthetic clay liner achieves excellent characteristic of impervious performance, and is broad in prospect and application value in the field of the waterproof coiled materials.

Description

technical field [0001] The invention discloses an anti-seepage bentonite waterproof blanket, which belongs to the technical field of waterproof coiled materials. Background technique [0002] Due to its good expansibility, dispersibility and adsorption, bentonite is widely used as an anti-seepage isolation layer in dams and excavation projects to prevent salt water from eroding mine layers and control groundwater pollution. The average size of sodium bentonite crystals is smaller, the dispersion is good, the expansion force is strong, and the water absorption rate is between 4-6. In addition, the double-layer hydration shell between the layers has strong water holding capacity, and a dense layer is formed after hydration is saturated. A gel that blocks pore water flow. Therefore, the permeability of sodium-based bentonite is much lower than that of calcium-based bentonite, which has the effect of waterproof and anti-seepage. [0003] Bentonite waterproof blanket (GCL for s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B3/16E02D31/00B32B9/04B32B33/00C04B20/02C04B28/26
CPCB32B9/04B32B33/00B32B2307/7145B32B2307/7265C04B20/023C04B28/26E02B3/16E02D31/004E02D31/006E02D2300/0093E02D2450/106E02D2450/108C04B24/2623C04B14/104
Inventor 黄磊许蘅陈龙
Owner 广州腾飞建筑工程材料有限公司
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