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Geological Society, London, Engineering Geology Special Publications
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Geological Society, London, Engineering Geology Special Publications; 1996; v. 11; p. 37-44;
DOI: 10.1144/GSL.ENG.1996.011.01.04
© 1996 Geological Society of London

Section 1: Investigation, hazard assessment and remediation of existing landfills

Engineering properties of two types of pulverized fuel ash

M. Mahmoud & R. S. Morley

WS Atkins Consultants Limited, Woodcote Grove, Ashley Road, Epsom, Surrey KT18 5BW, UK

The engineering characteristics of two types of pulverized fuel ash (PFA) are investigated in terms of their geotechnical properties. The two PFAs investigated are (1) a ‘lagoon’ PFA, subsequently stockpiled and then end-tipped for infilling an old gravel pit in Staffordshire, and (2) a ‘conditioned’ PFA used to create a mound adjacent to a coal power station in Yorkshire. Measurements of strength and compressibility characteristics are discussed with respect to predicting the behaviour of these two PFAs vis-à-vis slope stability and settlement. Charts are presented (a) for determining settlements of lagoon PFAs, and (b) for establishing strength parameters of conditioned PFAs.