BibTex format
@inproceedings{Ghiadistri:2018,
author = {Ghiadistri, GM and Potts, DM and Zdravkovic, L and Tsiampousi, A},
title = {A new double structure model for expansive clays},
url = {http://hdl.handle.net/10044/1/62201},
year = {2018}
}
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Citation
RIS format (EndNote, RefMan)
TY - CPAPER
AB - The behaviourof compacted bentonite upon hydration is numerically investigated here by simu-lating a swelling pressure teston aMX-80 bentonitesample. Two constitutive modelsareemployed in the analysis: the “Imperial College Single-Structure Model” (ICSSM)andthe “Imperial College Double-Structure Model” (ICDSM), the latterspecifically developed for expansive clays. It is shown that the latter exhibits a considerably improved performance as it is able to accurately capture the swelling pressure developed in the materialupon wetting. Nevertheless, a limited knowledge of the evolution of the material’s fabric, notably at the micro-scale,is an obstacle for deriving with certainty some of the model parameters. This issue is high-lightedhere by performing analyses of theswelling pressure test with two sets ofmaterial characterisations, with model parameters differinginthe derivation of the microstructural component.Both analyses show a very good match with the testdata, but it is difficult to justify one set of microstructural parametersoverthe other. The paper emphasises what aspects of experimental research could be helpful in studying the fabric of compacted bentonite upon wetting, and hence improve the calibration procedure of thedouble-structure mod-el.
AU - Ghiadistri,GM
AU - Potts,DM
AU - Zdravkovic,L
AU - Tsiampousi,A
PY - 2018///
TI - A new double structure model for expansive clays
UR - http://hdl.handle.net/10044/1/62201
ER -