Preparation of impervious material for wall of leachate balance basin

Abstract

The invention relates to a preparation method for a barrier material, in particular to the barrier material suitable for the wall of a percolate equalizing tank. The preparation method comprises the following steps: taking fly ash and ardealite as main raw materials, taking a HAS curing agent and stalk fibers as added materials, mixing the materials, carrying out the dry mixing, carrying out a first wet mixing, carrying out the intermixing, and carrying out a second wet mixing. The preparation method is simple and free in pollution, has a wide range of raw material sources and low cost. The barrier material for the wall of the percolate equalizing tank can effectively solve the defects of cracking, acidic and alkaline corrosion, poor frost resistance, bad barrier property, and the like lying in the wall of the prior percolate equalizing tank, thereby not only greatly improving the crack resistance of the tank wall and simultaneously improving the barrier property, acidic and alkaline corrosion resistance and frost resistance of the tank wall, but also having a simple construction process, easy operation, and the capability of greatly reducing the cost of the percolate equalizing tank.

Description

technical field [0001] The invention relates to a preparation method of an anti-seepage material, in particular to an anti-seepage material suitable for the wall of a leachate regulating pool. Background technique [0002] With the continuous acceleration of the urbanization process, the annual output of urban waste in my country is also increasing year by year. At present, the state attaches great importance to the sanitary landfill treatment of urban domestic waste, and many large-scale landfills have been newly built. However, the leachate produced in the landfill process is an important source of underground environmental pollution, and its treatment is a bottleneck problem that restricts the development of landfill technology and controls the environmental pollution around the landfill. The increase in the daily amount of waste processed by landfills has also led to an increase in leachate production year by year. A large amount of leachate is finally discharged into ...

AI Technical Summary

Problems solved by technology

Due to factors such as heat of hydration, air temperature, solar radiation, early shrinkage and deformation of concrete, humidity changes, and foundation deformation, the walls of reinforced concrete pools are prone to cracks, resulting in a decline in the impermeability of the regulating pool, leakage of leachate, and pollution of the surrounding environment.

At the same time, the frost heave of concrete is poor. In severe cold areas, due to the continuous change of seasonal temperature, the strength of concrete is reduced, which leads to the weakening of its ability to resist shear damage, causing deformation and leakage of the regulating pool, and shortening the service life.

In addition, the concrete itself has weak resistance to acid and alkali erosion. Under the long-term erosion of leachate, the wall structure of the regulating pool is easily damaged, and the leachate corrosion and osmotic pressure cause certain damage to the geomembrane, making its impermeability significantly decreased

The geomembrane anti-seepage tank structure is easy to be punctured during construction and operation management due to the thin geomembrane, which greatly reduces its anti-seepage performance.

At the same time, the disadvantages of high cost and complicated laying process also restrict the wide application of geomembrane materials.

[0004] At present, the wall of the leachate adjustment tank generally has some shortcomings such as crack resistance, poor frost resistance, weak acid and alkali resistance, and impermeability is not easy to guarantee.

After a new search, no method and relevant applicable materials for the treatment of the leachate regulating tank wall were found.

At the same time, the cost of the leachate adjustment tank is high, the quality is poor, there is potential leakage, etc., and the cost of raw materials required is relatively high

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