Construction of mineral sealing layer for waste disposal dump - by determn. of permeability, montmorillonite content and swelling clay content and adjustment w.r.t. safety requirements by addn. of additive, esp. organophilic bentonite

摘要

In construction of a mineral sealing layer, the permeability of the sealing material is determined, the contents of montmorillonite and of other swelling clay minerals are determined, the safety requirements of the waste dump to be constructed are compared with the permeability and the content, the sealing materials are improved with additives so that retention of pollutants is raised and diffusion is slowed down, the improved sealing materials are compressed, and the mineral selaing layer obtd. is kept ready for the construction of a basic waste disposal sealing system. Opt. the first stage is determn. of the strength of the homogeneous layer. USE/ADVANTAGE - An optimum cost/utilisation process is provided. Inclusion of a highly adsorptive, organophilic bentonite in the barrier system increases the life and security of the waste barrier. The process is used to seal any type of waste dump. to raise retention of pollutants or where drainage water has a loading of heavy metals or a high organic loading.