Influence of Fly Ash Leachate on the Hydraulic and Mechanical Behavior of Bentonites
Publication: Geo-Congress 2024
ABSTRACT
The present study aims to investigate the influence of fly ash leachate (FL) on the hydraulic and mechanical behaviour of two Indian bentonites with discrete mineralogical and chemical compositions. The investigation revealed that both bentonites with different mineralogical and physical properties noticeably affected free swelling, Atterberg limits, swelling potential, swelling pressure, and hydraulic conductivity. However, a comparative assessment for both types of bentonites shows that swelling capability, liquid limit, cation exchange capacity, and the specific surface area experience a directly proportionate variation to the free swell (80% decline), liquid limit (74% decline), swelling potential (61% decline), and swelling pressure (59% decline) when permeated with FL. In addition, a rise in hydraulic conductivity (28 and 38 times rise at a void ratio of 1.1) was observed with leachate presence for both bentonites. The research findings would therefore prove constructive to engineers for deciding on bentonite types for liner application in landfills.
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Information & Authors
Information
Published In
Geo-Congress 2024
Pages: 526 - 535
History
Published online: Feb 22, 2024
ASCE Technical Topics:
- Ashes
- Bentonite
- Clays
- Continuum mechanics
- Dynamic pressure
- Dynamics (solid mechanics)
- Engineering materials (by type)
- Engineering mechanics
- Environmental engineering
- Fly ash
- Geomechanics
- Geotechnical engineering
- Hydraulic engineering
- Hydraulic properties
- Hydraulics
- Leachates
- Material mechanics
- Material properties
- Materials engineering
- Mechanical properties
- Pressure (type)
- Soil mechanics
- Soils (by type)
- Solid mechanics
- Swelling (material)
- Waste management
- Waste treatment
- Water and water resources
Authors
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