Please note that this is a scanned copy of a paper originally published in 1994, so the text is not as clear as in documents created as pdf files.
Cut-off walls consisting of self-hardening cement-bentonite are used to contain leachate and/or gases at landfill sites and former industrial sites. Geomembranes are frequently incorporated into the slurry to act as the main element of the barrier. This Digest discusses materials and specification of cement bentonite mixes and geomembranes in contaminated land.