Multiplex design container having a three-layered wall structure and a process for producing the same

Claim 1

A high-capacity and high integrity durable and resistent container for the burial and disposal of hazardous waste materials below ground, said container comprising a metallic vessel as an outer layer; a high-strength concrete lining formed of a cement paste comprising a mixture of cement and water, and optionally sand and aggregate, said high-strength concrete lining being formed on the inner surface of the metallic vessel and being reinforced with a reinforcing material, said reinforcing material optionally comprising metal fibers present in an amount no greater than about 2% by Vol., and said high-strength concrete lining being dried with the removal therefrom of evolved water vapor and the creation of a thin gap between said metallic vessel and said concrete lining due to the shrinkage of said lining during the drying thereof, and said high-strength concrete lining being impregnated with a solidified liquid impregnant; a thin, continuous solidified barrier layer formed as a continuous intermediate layer in the thin gap between said metallic vessel and said concrete lining, said barrier layer consisting of said impregnant and being integral with the impregnant within said concrete lining, said thin continuous barrier layer constituting a barrier to the penetration of chemicals, water and acids, whereby upon burial of said high-integrity container and corrosion over time of said metallic vessel, said high-strength concrete lining with said barrier layer retains its integral self-supporting shape and condition of being impact resistant, durable, mechanically strong and water tight.