Details of Grant 

EPSRC Reference:	GR/L08908/01
Title:	MECHANISMS AND QUANTITATIVE ANALYSIS OF LANDFILL GAS MIGRATION IN CLAY LINERS
Principal Investigator:	Horseman, Dr S
Other Investigators:	Thomas, Professor HR
Researcher Co-Investigators:
Project Partners:	Pre Nexus Migration S. Grundon Waste Ltd
Department:	Fluid Processes Group
Organisation:	NERC Grouped
Scheme:	Standard Research (Pre-FEC)
Starts:	01 November 1996	Ends:	31 October 1999	Value (£):	121,746
EPSRC Research Topic Classifications:	Waste Management
EPSRC Industrial Sector Classifications:	Environment
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Summary on Grant Application Form
The proposed study focuses on the performance of the clay liner, as currently constructed to the NRA standard, in acting as a barrier to gas movement. Laboratory gas injection experiments will be performed on a number of clay types currently used in liner construction using a modified form of the BGS gas permeameter in which clay specimens are isotropically stressed and backpressured with water to simulate in situ conditions within the liner. Pre- and post-text examination of text samples will provide information on clay fabric and pore structures. In order to examine possible scale effects on transport properties, a number of field gas injection experiments will be performed at operational landfills. A theoretical study, supported by a literature review, is aimed at the development of quantitative models of the gas transport mechanism in compacted clays.
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