CGRG Bibliography of Canadian Geomorphology
Search Results
Author : Dore, G.; Konrad, J-M.; and Bérubé, M.A.
Date : 1998
Title : The effect of consolidation on frost susceptibility of silty soils.
Publication : Permafrost, Seventh International Conference, June 23-27, Yellowknife, Canada. Edited by: A.G. Lewkowicz and M. Allard. Université Laval, Centre d'études nordiques, Collection Nordicana.
Issue : 57:
Page(s) : 239-244.
Abstract
The frost susceptibility of silty soils tends to increase with level of consolidation. This has been explained by the fact that the intergranular structure of an overconsolidated soil might lead to higher unfrozen water contents thus increasing the effective hydraulic conductivity of the soil in the frozen fringe. This study was undertaken to demonstrate the validity of this theory using direct observation, with a Scanning Electron Microscope (SEM), of the intergranular structure of a clayey silt and specific measurement of the pore characteristics. It was found that the intergranular structure is strongly influenced by the level of consolidation. A simple model was developed to estimate the unfrozen water content in the frozen fringe. According to a series of measurements on pores observed using the SEM, it was found that the unfrozen water content for a soil having an overconsolidated ratio of 8 can be estimated to be 2.5 times larger than for a normally consolidated soil.
Bibliography of Canadian Geomorphology