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Influence of geogrid layer on the integrity of compacted clay liners of landfills

DSpace at IIT Bombay

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Title Influence of geogrid layer on the integrity of compacted clay liners of landfills
 
Creator VISWANADHAM, BVS
MUTHUKUMARAN, AE
 
Subject centrifuge
waste
centrifuge test
clay
clay liners
geogrid
hydraulic conductivity
landfill
lining
model test
non-uniform settlements
wastes
 
Description The objective of this paper is to examine the influence of geogrid layer on the integrity of clay liners of landfills. A series of centrifuge model tests were performed on model clay liners subjected to non-uniform settlements with and without a geogrid layer embedded within the top one-third portion of the clay liner moist-compacted on the wet side of its optimum moisture content at 40 g. The model clay liner material has been selected in such a way that it envelopes the material characteristics of the clay liners, which are used for constructing an impermeable barrier in a lining system. By maintaining type and location of the geogrid within the clay liner as constant, the thickness of clay liner is varied to check the possibility of reducing the thickness of a geogrid reinforced clay liner. Digital image analysis technique was employed to ascertain the initiation of cracking and to compute strains both on the surface and along the cross-section of the clay liner with and without any geogrid layer. It was observed that clay liners compacted at moulding water content towards wet side of their OMC found to experience multiple cracking at the onset of non-uniform settlements. Contrary to this, geogrid reinforced clay liner was observed to sustain large distortions and experience only tiny cracks limited up to a location of a geogrid. With an increase in thickness of the clay liner reinforced with a geogrid, geogrid reinforced compacted clay liner was observed to retain its integrity and restrains cracking completely.
 
Publisher JAPANESE GEOTECHNICAL SOC
 
Date 2011-08-04T09:01:58Z
2011-12-26T12:54:38Z
2011-12-27T05:42:46Z
2011-08-04T09:01:58Z
2011-12-26T12:54:38Z
2011-12-27T05:42:46Z
2007
 
Type Article
 
Identifier SOILS AND FOUNDATIONS, 47(3), 517-532
0038-0806
http://dx.doi.org/10.3208/sandf.47.517
http://dspace.library.iitb.ac.in/xmlui/handle/10054/9307
http://hdl.handle.net/10054/9307
 
Language en