Sodium bentonite waterproof blanket and preparation method thereof

Abstract

The invention belongs to the field of building materials, and particularly relates to a sodium base bentonite waterproof blanket and a preparation method thereof for water ecological system protection and remediation as well as waterproofness of buildings. The sodium base bentonite waterproof blanket comprises nonwoven geotextiles on the bottom layer, a sodium base bentonite layer in the middle and plastic woven film yarn geotextiles on the surface layer, wherein the sodium base bentonite layer is fixed between the nonwoven geotextiles and the plastic woven film yarn geotextiles by a needle-punching method. The sodium base bentonite waterproof blanket can be applied to multiple complex and severe water quality environment projects, and belongs to environmental-friendly waterproof materials, and reinforces the integral size stability and mechanical intensity greatly; the sodium base bentonite layer fully inspires the performance potential of bentonite, and the obtained high-expansion-performance sodium base bentonite is good in dispersibility in water, and is good in mud colloid performance; the plastic woven film yarn geotextiles have good impermeable effect, are beneficial to the guarantee of the quality of a product, and are stable in performance coefficient.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a sodium-based bentonite waterproof blanket and a preparation method thereof, which are used for protection and restoration of water ecosystems and waterproofing of buildings. Background technique [0002] Sodium-based bentonite waterproof blanket is a new type of environmentally friendly flexible geosynthetic material, referred to as GCL, which can be applied to waterproof geosynthetics such as artificial lake water features, landfills, underground garages, pools, oil depots and chemical storage yards; It has been widely used and promoted in China's construction industry. In addition to its strong waterproof performance, it also has typical characteristics such as low temperature flexibility, resistance to freeze-thaw cycles, self-sealing, resistance to uneven settlement, and simple construction. [0003] Sodium bentonite waterproof blanket, which is widely used at ...

AI Technical Summary

Problems solved by technology

In recent years, with the development of agricultural production and society, water pollution has become more and more serious, which has caused the water quality environment near some underground waterproofing projects to be quite complicated, and because the chemical substances in the sewage react with the sodium-based bentonite particles inside the waterproof blanket, when The cations in the pollutants undergo an ion exchange reaction with the sodium ions between the bentonite layers to replace the sodium ions between the layers, causing the sodium bentonite to lose its proper properties

Therefore, the existing common sodium bentonite waterproof blanket can no longer exert a good waterproof effect in complex water quality environments.

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