Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.13/806714

OpenURL Link
Title
Experimental study of the effect of fines content on dynamic compaction grouting in completely decomposed granite of Hong Kong
Author/Creator
Wang, Shanyong;  Chan, Dave;  Lam, Ka Chi
Institution
The University of Newcastle. Faculty of Engineering & Built Environment, School of Engineering
Description
This paper addresses the effects of fines contents on the mechanical behavior of CDG (completely decomposed granite) during dynamic compaction grouting. The first set of tests involved adding different amounts of kaolin clay into CDG to study the effects of fines contents on the compaction characteristics, permeability, consolidation behavior and shear strength of soils. It is found that, as the fines content increases, the dry density decreases, however the optimum water content increases. In addition, the permeability decreases due to reduction of void ratio, and the coefficient of consolidation increases with higher fines content. Furthermore, with increasing fines contents, the shear stress tends to be constant after it reaches the peak strength. However, when reaching the peak value, the shear stress reduces with further adding of fines content. In the second set of tests, the dynamic compaction grouting tests are carried out to study the effect of fines content on the compaction efficiency of Hong Kong CDG. It is found that, the compaction efficiency increases with increasing fines content, and reaches the peak compaction efficiency when the fines content reaches 6%, and then the compaction efficiency drops abruptly from a peak value of 0.55–0.25 when the fines content increases from 6% to 8%. However, when the fines content increases from 8% to 41%, the compaction efficiency decreases very slowly.
Relation
Construction and Building Materials Vol. 23, Issue 3, p. 1249-1264
Publisher Link
http://dx.doi.org/10.1016/j.conbuildmat.2008.08.002
Date
2009
Publisher
Elsevier
Keyword(s)
dynamic compact grouting;  fines content;  shear strength;  optimum water content;  soil improvement
Resource Type
journal article
Identifier
http://hdl.handle.net/1959.13/806714
Identifier
ISSN:0950-0618
Reviewed
Reviewed
46 Visitors 53 Hits 0 Downloads
Save/E-mail Citation
Citation Format
E-mail Address
Subject
"Construction and Building Materials"
 
OR