Lime pile techniques for the improvement of clay soils
- 1 June 2015
- journal article
- research article
- Published by Canadian Science Publishing in Canadian Geotechnical Journal
- Vol. 52 (6), 760-768
- https://doi.org/10.1139/cgj-2014-0073
Abstract
Soil improvement is one of the basic requirements for preparing in situ soils for appropriate strengthening, stiffness, and stability in civil engineering designs and applications. The modification technique, which involves mechanical, thermal, and chemical components, requires monitoring techniques to determine its efficiency and suitability. This study examines the geotechnical improvement of clay soils using the lime pile technique on a laboratory-scale model. The clay-lime physicochemical reactions resulting from cation exchange were examined through basic experimental analyses. In addition, electrical conductivity measurements were performed on the selected treated soils to examine variations in their electrical properties. Remolded compacted clay soil blocks were carefully prepared in circular steel test tanks with lime piles installed in them. The treated soil block properties were then investigated as a function of radial lime pile distances and curing periods. It was observed that there are significant changes in the Atterberg limit, linear shrinkage, compaction characteristics, and strength of the treated soils due to the clay-lime reactions. The results indicate that these reactions have remarkable effects on the electrical properties of the lime pile-treated soil and produced strong interparticle bonds and unconfined compressive strength of the soil. This is attributed to the migration of Ca2+ and Mg2+ ions from the lime piles into the soil, flocculation of particles, and pozzolanic reactions. The significant changes in the electrical properties and shear strength values suggest that their correlative changes can be used as amonitoring technique to determine the improvement in geotechnical properties of chemically treated soils.Keywords
This publication has 24 references indexed in Scilit:
- The effect of compaction on soil electrical resistivity: a laboratory investigationEuropean Journal of Soil Science, 2010
- Determination of Selected Geotechnical Properties of Soil Using Electrical Conductivity TestingGeotechnical Testing Journal, 2009
- Soil properties influencing apparent electrical conductivity: a reviewComputers and Electronics in Agriculture, 2005
- Electrical resistivity measurement applied to cracking assessment on reinforced concrete structures in civil engineeringNDT & E International, 2003
- Evaluation and Quality Control of Dry-Jet-Mixed Clay Soil-Cement Columns by Standard Penetration TestTransportation Research Record: Journal of the Transportation Research Board, 2003
- Caractérisation de l'endommagement du béton par mesures électriquesMaterials and Structures, 2002
- Utilization of an Industrial Waste in Calcareous Expansive Clay StabilizationGeotechnical Testing Journal, 2002
- Compressibility and hydraulic conductivity of a chemically treated expansive clayCanadian Geotechnical Journal, 2001
- Electrical properties of water in clay and silty soilsJournal of Applied Geophysics, 1998
- Estimating Aquifer Permeability from Formation Resistivity FactorsGroundwater, 1985