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A laboratory study on strength loss in kaolin surrounding lime-cement columns
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Soil and Rock Mechanics.ORCID iD: 0000-0001-9615-4861
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Soil and Rock Mechanics.
KTH, School of Architecture and the Built Environment (ABE), Land and Water Resources Engineering (moved 20130630).
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
Abstract [en]

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.
Keyword [en]
Lime and cement, Clayey soils, Kaolin, Stabilisation, Deep mixing, Migration
National Category
Earth and Related Environmental Sciences
Identifiers
URN: urn:nbn:se:kth:diva-32344DOI: 10.1016/j.clay.2008.12.009ISI: 000265327000015Scopus ID: 2-s2.0-62349118122OAI: oai:DiVA.org:kth-32344DiVA: diva2:410130
Note

QC 20110412

Available from: 2011-04-12 Created: 2011-04-12 Last updated: 2017-12-11Bibliographically approved

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Larsson, Stefan

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