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Low-permeability high-durability reinforced vertical barrier wall material and preparation method thereof

An enhanced and durable technology, applied in the field of barrier risk management and control of polluted sites, can solve the problems of reduced barrier performance, barrier barrier barrier performance degradation, adsorption performance decline, etc., to achieve improved crack resistance, good chemical compatibility, production The effect of simple process

Pending Publication Date: 2022-05-06
BIZHAO GEOTECHNICAL TECH NANJING CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Secondly, because it is located in a mountainous area, the groundwater level fluctuates greatly, causing the vertical barrier to experience a large number of dry-wet cycles, which may cause the barrier to crack due to the exposure of the dry-wet cycle, resulting in a decrease in strength and a reduction in its barrier performance
Under the stress of high-risk complex heavy metal pollutants, the barrier performance will deteriorate: for example, the anti-seepage performance will fail, the adsorption performance will decline, etc.

Method used

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Examples

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preparation example Construction

[0028] A method for preparing a low-permeability and high-durability reinforced vertical barrier wall material, comprising the following steps:

[0029] S1. Mix sodium polyacrylate with dried sodium-modified calcium-based bentonite, pour tap water at a solid-to-liquid ratio of 1:20 to make a slurry, stir with an electric mixer, and heat in a water bath at a temperature of 60°C. The speed of the electric stirrer is set at 200-500r / min, stirring for 5-10min;

[0030] S2, place the mud in a constant temperature oven at 60°C to dry, and grind it to a fineness of 200 mesh to obtain sodium polyacrylate modified bentonite;

[0031] S3, mixing sodium polyacrylate modified bentonite, sulfate-resistant Portland cement, in-situ soil and basalt fiber, using an electric mixer to maintain a speed of 200-500r / min, stirring for 5-10min, forming a composite soil dry powder;

[0032] S4. Add tap water to the sodium polyacrylate modified bentonite obtained in step S2 to prepare modified bentoni...

Embodiment 1

[0039] A method for preparing a low-permeability and high-durability reinforced vertical barrier wall material, comprising the following steps:

[0040] S1. Mix sodium polyacrylate with dried sodium-modified calcium-based bentonite, pour tap water at a solid-to-liquid ratio of 1:20 to make a slurry, stir with an electric mixer, and heat in a water bath at a temperature of 60°C. The speed of the electric stirrer is set at 200-500r / min, stirring for 5-10min;

[0041] S2, place the mud in a constant temperature oven at 60°C to dry, and grind it to 200 mesh to obtain sodium polyacrylate modified bentonite;

[0042] S3, mixing sodium polyacrylate modified bentonite, sulfate-resistant Portland cement, in-situ soil and basalt fiber, using an electric mixer to maintain a speed of 200-500r / min, stirring for 5-10min, forming a composite soil dry powder;

[0043] S4. Add tap water to the sodium polyacrylate modified bentonite obtained in step S2 to prepare modified bentonite slurry, stir ...

Embodiment 2

[0048] A method for preparing a low-permeability and high-durability reinforced vertical barrier wall material, comprising the following steps:

[0049] S1. Mix sodium polyacrylate with dried sodium-modified calcium-based bentonite, pour tap water at a solid-to-liquid ratio of 1:20 to make a slurry, stir with an electric mixer, and heat in a water bath at a temperature of 60°C. The speed of the electric stirrer is set at 200-500r / min, stirring for 5-10min;

[0050] S2, place the mud in a constant temperature oven at 60°C to dry, and grind it to 200 mesh to obtain sodium polyacrylate modified bentonite;

[0051] S3, mixing sodium polyacrylate modified bentonite, sulfate-resistant Portland cement, in-situ soil and basalt fiber, using an electric mixer to maintain a speed of 200-500r / min, stirring for 5-10min, forming a composite soil dry powder;

[0052] S4. Add tap water to the sodium polyacrylate modified bentonite obtained in step S2 to prepare modified bentonite slurry, sti...

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Abstract

The invention belongs to the technical field of polluted site barrier risk management and control, and particularly relates to a low-permeability high-durability enhanced vertical barrier wall material which comprises the following raw materials: 68-85% of in-situ soil, 5-10% of sodium modified calcium bentonite, 0.1-1% of a polymer, 0.01-0.1% of an additive and 5-10% of cement, the low-permeability and high-durability enhanced vertical barrier wall material effectively prevents the situation that the wall body of an unsaturated region of a mine polluted site cracks due to lifting of underground water, and has relatively high practicability.

Description

technical field [0001] The invention relates to the technical field of barrier risk management and control of polluted sites, in particular to a low-permeability and high-durability enhanced vertical barrier wall material and a preparation method thereof. Background technique [0002] Social development is inseparable from the comprehensive utilization of resources, and mineral resources are an important part of technological and economic development. With the gradual increase in the demand for metal mineral resources, the development of metal mines has been intensified, resulting in varying degrees of damage to the ecological environment of mines, such as geological disasters, water and soil pollution caused by the development of metal mines. If there is no artificial governance and interference, it will eventually lead to ecological imbalance in the mining area and exhaustion of resources, which will have a serious impact on local economic development and agricultural cons...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B20/02C04B14/46C04B14/10C04B111/20C04B111/34
CPCC04B28/04C04B20/023C04B2111/00775C04B2111/20C04B2111/343C04B14/361C04B14/104C04B14/4656
Inventor 毕钰璋孙新坡傅贤雷姜哲元王安辉伍浩良王心怡
Owner BIZHAO GEOTECHNICAL TECH NANJING CO LTD
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