A laboratory study on strength loss in kaolin surrounding lime-cement columns
2009 (English)In: Applied Clay Science, ISSN 0169-1317, E-ISSN 1872-9053, Vol. 44, no 1-2, 116-126 p.Article in journal (Refereed) Published
This study evaluated property changes in laboratory-prepared kaolin surrounding lime-cement columns. The parameters investigated included geotechnical parameters such as undisturbed undrained shear strength, remoulded shear strength, water content, and Atterberg limits. In addition the exchangeable Ca2+, Na+ and K+ ion concentrations were assessed. Four types of small-scale lime-cement columns were manufactured using different production methods and binder blending ratios. Tests were performed 7, 14, 30 and 90 days after installation. The migration of Ca2+, Na+ and V ions from the lime-cement columns into the surrounding soil has been confirmed through the chemical analysis on a large number of samples taken. The results illustrate that the undrained shear strength properties in the surrounding kaolin were significantly affected by the migration of Ca2+, Na+ and K+ ions. An increase in the Na+ and K+ ion concentrations in the front of the migrated Ca2+ ions was observed. The tests illustrate that, under the experimental conditions chosen, the remoulded undrained shear strength decreased in a thin zone as a result of the migrated Na+ and K+ ions. The magnitude of the strength loss depended on the binder blending ratio in the lime-cement columns.
Place, publisher, year, edition, pages
2009. Vol. 44, no 1-2, 116-126 p.
Lime and cement, Clayey soils, Kaolin, Stabilisation, Deep mixing, Migration
Earth and Related Environmental Sciences
IdentifiersURN: urn:nbn:se:kth:diva-32344DOI: 10.1016/j.clay.2008.12.009ISI: 000265327000015ScopusID: 2-s2.0-62349118122OAI: oai:DiVA.org:kth-32344DiVA: diva2:410130
QC 201104122011-04-122011-04-122012-01-10Bibliographically approved