Horizontal barrier material for risk management and control of polluted land parcel and preparation method

Abstract

The invention provides a horizontal barrier material for risk management and control of a polluted land parcel and a preparation method, belonging to the technical field of risk management and controlof polluted land parcels. The material comprises modified natural short fibers, a powder material and a liquid material in a mass ratio of 1: 20: 17, wherein the modified natural short fibers are modified jute fibers or modified Arenga engleri fibers with length of 2-6 mm; the powder material comprises Portland cement, ground calcium carbonate and quartz powder; the liquid material comprises a polymer emulsion, a defoaming agent, a coalescing agent, a compatibilizer, a dispersing agent and deionized water. The preparation method comprises the following steps: pouring the liquid material intoa container, carrying out uniform mixing, and adding a mixture obtained by uniformly mixing the modified natural short fibers and the powder material; and carrying out stirring for 10-20 minutes to obtain slurry liquid without block mass flow, thereby obtaining the material. The horizontal barrier material provided by the invention has the advantages of easy availability of raw materials, low cost, simple preparation method and excellent barrier properties, can block the migration of a polluted medium to a surrounding environment, and can provide a good in-situ horizontal barrier for the polluted land parcel after application.

Description

technical field [0001] The invention belongs to the field of barrier technology for risk management and control of polluted plots, and in particular relates to a horizontal barrier material and a preparation method for risk control of polluted plots. Background technique [0002] In recent years, with the adjustment of urban industrial layout, a large number of heavy polluting industrial enterprises such as non-ferrous metal smelting, chemical industry, electroplating, and tanning have been closed and relocated, leaving behind many polluted plots. These plots are scattered in the city, endangering human living health, Threats to the safety of the ecological environment, and the hidden dangers of environmental risks are prominent. A series of policy requirements on the prevention and control of soil pollution issued by the environmental protection department have led to the rapid development of treatment and restoration technologies for polluted land plots. For problems that...

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Problems solved by technology

The problems of these materials are: asphalt and concrete cover are thicker, which increases the engineering volume and disposal difficulty of the subsequent treatment and restoration of the contaminated land; while the clay uses a large amount of soil and is expensive, which is easy to increase the contaminated soil and is not convenient for subsequent pollution. Treatment and restoration of plots; elastic film materials such as polyvinyl chloride, polyethylene, and high-density polyethylene have poor structural strength, are prone to aging, and cause secondary pollution. Existing barrier materials have their own problems and defects