Stewart, D.I., Cousens, T.W. and Charles-Cruz, C.A. (2006) The interpretation of CPT data from hydraulically placed pfa. Engineering Geology, 85 (1-2). pp. 184-196. ISSN 0013-7952
Available under licence : See the attached licence file.
Cone penetration test (CPT) results on an ~20 year old, hydraulically placed pulverised fuel ash (PFA) deposit are reported, along with the results of oedometer compression tests on ‘undisturbed’ specimens recovered during the site investigation and resedimented PFA samples. The latter showed that aged PFA can undergo significant secondary compression. The correlation between volume compressibility and cone resistance, mv=1/(αqc), is fitted to compressibility data from undisturbed samples to determine α. The resulting CPT compressibility profile shows good agreement with compressibility trends for aged PFA estimated from the tests on resedimented ash. It is therefore recommended that a value of α=11 should be used for normally consolidated, aged PFA. The danger of biased sampling in very loose non-cohesive materials and the need for depth profiling by in situ measurement are highlighted.
|Copyright, Publisher and Additional Information:||© 2006 Elsevier B.V. All rights reserved. This is an author produced version of a paper published in Engineering Geology.|
|Keywords:||Compressibility; Cone penetrometers; CPT; Fly-ash; PFA; Settlement; Silts|
|Institution:||The University of Leeds|
|Academic Units:||The University of Leeds > Faculty of Engineering (Leeds) > School of Civil Engineering (Leeds)
The University of Leeds > Faculty of Engineering (Leeds) > School of Civil Engineering (Leeds) > Inst for Pathogen Control Engineering (Leeds)
|Depositing User:||Douglas I Stewart|
|Date Deposited:||21 Jun 2006|
|Last Modified:||05 Jun 2014 01:50|