Ekinci, A; Ferreira, PMV; (2012) Effects of Fibre Inclusion on Stress Strain Behaviour of a Compacted Over-consolidated Clay From Lambeth Group. In: Indraratna, B and Rujikiatkamjorn, C and Vinod, JS, (eds.) Proceedings of the International Conference on Ground Improvement & Ground Control Transport Infrastructure Development and Natural Hazards Mitigation. Research Publishing Services: Australia.

Preview

Text icgicg2012 P_AV1 11.pdf Download (299kB)

Abstract

Micro reinforcement in clays is an area that needs further research as little is known about the undrained behaviour of such composite materials, especially when compaction is concerned. This work presents preliminary data from isotropically consolidated undrained triaxial tests in reinforced and unreinforced compacted samples in the laboratory. The clay used in the tests is a heavily over-consolidated clay from the Lambeth Group. In order to mimic the in situ conditions, created by the use of a rotovator to mix the fibres with the soil, samples were prepared by chopping the clay into small peds (10 to 15mm) that were mixed with the fibres and dynamically compacted to form triaxial samples of 100mm in diameter and 200mm in height. The analysis of the triaxial testing results provided an insight into how the inclusions of fibres change the failure mechanism of the compacted soil. Reinforced samples show a strain-hardening behaviour throughout the whole shearing stage while the unreinforced samples present a reduction in deviatoric stress at higher strains, characteristic of strain localisation. The results also show that the reinforced samples generate higher pore water pressures during the shearing stage, indicating that they have a higher tendency to compress than the unreinforced samples.

Download activity - last month

Export as JSONXMLCSV

Download activity - last 12 months

Export as JSONCSVXML

Downloads by country - last 12 months

Export as CSVXMLJSON

Archive Staff Only

View Item