Antiseepage leak-stopping organic grouting material used for landfill and application method

Abstract

An antiseepage leak-stopping organic grouting material used for landfill and an application method thereof. According to the gross weight of the slurry, the antiseepage leak-stopping organic grouting material contains 60-80 wt% of polyurethane and 20-40 wt% of a dichloromethane diluent. The application method comprises the following steps of: 1) mixing 60-80 wt% of polyurethane and 20-40 wt% of the dichloromethane diluent with stirring, and filling the mixture into a specified position; and 2) maintaining, preventing water and preventing impurity pollution. According to the invention, the problem of single performance of common organic grouting materials is overcome. The antiseepage leak-stopping organic grouting material provided by the invention has good groutability, binding property and flexibility, has good adaptability, and can be used to rapidly and effectively repair leaks of an HDPE film used in an impervious layer of a refuse landfill. The repaired material has high corrosion resistance and low permeability and the permeability coefficient meets the national standards. Simultaneously, the material has good flexibility after solidification, and secondary damage caused by nonuniform settlement of the refuse landfill bottom to the repaired part can be overcome.

Description

technical field [0001] The invention relates to a grouting material, in particular to a high-performance and flexible organic grouting material used for HDPE film leakage repair in the anti-seepage layer at the bottom of the landfill and landfill anti-seepage and plugging. [0002] The present invention also relates to a method for using the above-mentioned organic grouting material. Background technique [0003] Garbage disposal methods can generally be divided into sanitary landfill, incineration, stabilization treatment and other methods. Landfill is a place where garbage is piled up under the sanitary landfill method, and the cost is relatively low. It has been widely used in China in recent years. In general, sanitary landfills will produce a large amount of leachate, which contains a variety of toxic and harmful substances. Therefore, in order to prevent leachate from polluting soil and groundwater, landfills must be designed with a safe anti-seepage system. Accordi...

AI Technical Summary

Problems solved by technology

[0007] At present, there are many types and grades of organic grouting materials produced at home and abroad, but no material for repairing HPDE membrane holes in the anti-seepage layer of landfills has been found, and the existing organic grouting materials have single performance, and some have too high viscosity. Poor fluidity and poor pourability; some initial setting time is too long, which makes the construction period longer; some have poor flexibility and durability after solidification; some are highly toxic and do not meet environmental protection requirements, etc. Performance requirements such as permeability, permeability, adhesion, flexibility, durability, etc., cannot repair the leakage of HDPE membrane in the anti-seepage layer at the bottom of the landfill, or the price is expensive, the cost performance is low, or the toxicity is relatively high. Big