Author:
Martins Ligia A.,Correia AntYónio A.S.,Oliveira Paulo J. Venda,Lemos Luis J.L.
Abstract
The present study aims to indirectly evaluate the occurrence of suction and its effects in laboratory tests of a chemically stabilized soft soil. To achieve these goals, a series of unconfined compressive strength (UCS) and triaxial tests were performed, with and without the application of cyclic loading and with and without membrane during the cyclic loading stage, to evaluate the occurrence of suction and its effect on the mechanical behavior of a chemically stabilized soft soil. The results show that during the cyclic loading stage there is an occurrence of suction which influences both the permanent axial strain during the cyclic loading and the maximum strength of the stabilized soil. During the cyclic loading stage, the occurrence of suction promoted the increase of the plastic deformation. In terms of strength, it is observed an occurrence of suction in the stabilized soil which may be related with the increase of the strength. It is observed that suction can be avoided by saturation of the sample, verified in triaxial tests, or by using a membrane during the cyclic UCS test.
Reference31 articles.
1. Abdullah H.H., Shahin M.A., Walske M.L., Karrech A. “Systematic approach to assessing the applicability of flyash-based geopolymer for clay stabilization”, 57, 1356–1368, 2020. 10.1139/cgj-2019-0215
2. Åhnberg H. “Strength of stabilised soil - a laboratory study on clays and organic soils stabilised with different types of binder”, Lund University, 197, 2006.
3. ASTM-D2487 “Astm d2487, standard practice for classification of soils for engineering purposes (unified soil classification system)”, ASTM International, 1998. 10.1520/D2487–11
4. Basha E.A., Hashim R., Mahmud H.B., Muntohar A.S. “Stabilization of residual soil with rice husk ash and cement”, 19, 448–453, 2005. https://doi.org/10.1016/j.conbuildmat.2004.08.001
5. BSI-1377-7 “Bsi 1377-7: Methods of test for soils for civil engineering purposes. Shear strength tests (total stress)”, British Standards Institution, London, UK, 1990.