Date of Award


Degree Name

Master of Science



First Advisor

Dr. Richard Passero

Second Advisor

Dr. John D. Grace

Third Advisor

Dr. W. Thomas Straw

Access Setting

Masters Thesis-Open Access


A principle objective of using bentonite as a soil additive is to reduce the permeability of a cover material, thus, inhibiting the infiltration of surface waters at landfill sites.

Twenty-two cores of the KL landfill were taken to obtain in-situ soil columns for testing. Coefficients of permeability were calculated for each soil column using the falling-head permeameter. Mechanical and hydrometer analyses were used for the grain size analysis. The methylene-blue test was employed to determine the actual percentages of bentonite present in each soil column. X-ray diffraction work was done on the clay fraction of each soil column to verify and augment the data gained from the methylene-blue test.

Permeability values ranged from 1.6 x 10-3 cm/s to 1.9 x 10-6 cm/s at the KL landfill, and averaged 1.6 x 10-4 cm/s. These values are greater than the preferred levels for a landfill cover material.

Included in

Geology Commons