Prediction of hydraulic conductivity of clay liners: A field and laboratory study

Thesis/Dissertation · Mon Jan 01 04:00:00 EST 1990

OSTI ID:7014790

Almusawe, S J

A local natural clay soil, 'Terra-Seal Natura Premix[reg sign],' was used for this study because this soil is used in the construction of a number of landfills in Florida. A series of rigid-wall permeameter tests were performed for a quantitative prediction of hydraulic conductivity variation as a function of sample thickness, number of layers, hydraulic gradient, porosity, degree of saturation, dry unit weight, and time. The variation of moisture content versus depth for the fully saturated samples was found to vary significantly. Measurements were also made of the variation of partially saturated soil suction with dry unit weight and moisture content. A number of field infiltration tests were conducted at two existing landfill projects, and coefficients of hydraulic infiltration were measured. Using these values and the amount of suction obtained in the laboratory, saturated hydraulic conductivities were predicted. These predictions agreed very closely with those obtained in the laboratory by the author and others. Desiccation cracks, depth versus dry unit weight, and moisture content variations were studied in the field. Three test strips, constructed using one, two, and three layers, were subjected to equal compactive energies. Field hydraulic conductivity can be predicted accurately and efficiently by the method developed in this study.

• Research Organization: Florida Univ., Gainesville, FL (United States)
• OSTI ID: 7014790
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540220* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
540320 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (1990-)
CLAYS
CONTAMINATION
CONTROL
DISPERSIONS
FORECASTING
HYDRAULIC CONDUCTIVITY
LEACHATES
LINERS
MANAGEMENT
MIXTURES
POLLUTION CONTROL
SANITARY LANDFILLS
SOILS
SOLUTIONS
WASTE DISPOSAL
WASTE MANAGEMENT
WATER POLLUTION CONTROL