Document Type
Thesis
Date of Award
1-31-1989
Degree Name
Master of Science in Environmental Engineering - (M.S.)
Department
Civil and Environmental Engineering
First Advisor
Raj P. Khera
Second Advisor
Paul C. Chan
Abstract
A study was undertaken in order to provide insight into the behavior of backfill materials when in contact with hazardous chemicals. It was found that the liquid limit is not a reliable parameter in assessing clay behavior when exposed to these chemicals. However, the expansion index provided a consistent correlation to permeability when all other conditions were kept constant. In addition, the use of fly ash mixed with clay showed an increase in the values of permeability even though its grain size is finer than that of sand. It is believed that this phenomenon was the result of the absence of silica or silica oxide content. The content of bentonite dictated the behavior of permeability, such that a reduction in bentonite would result in increased permeability and vice versa. An evaluation of the effect of permeants (water & phenol) upon permeability was conducted. A sample of 10 percent SS-100 clay and sand was tested. It was found that the permeability of phenol (60,000 ppm) was less than that of water. This suggested that this clay is more suitable for use in backfill mix.
Recommended Citation
Umer, M. Khalid, "Durability of slurry cut-off walls around hazardous waste sites" (1989). Theses. 2937.
https://digitalcommons.njit.edu/theses/2937
