Analysis of Swelling and Shrinkage Behavior of Compacted Clays |
| |
Authors: | Anil Kumar Mishra Sarita Dhawan Sudhakar M Rao |
| |
Institution: | (1) Geotechnical and Geoenvironmental Engineering Laboratory, Department of Civil Engineering, Seoul National University, Seoul, 151-742, South Korea;(2) Department of Civil Engineering, Indian Institute of Science, Bangalore, 560 012, India |
| |
Abstract: | The impact of the variation in compaction condition on the swelling and shrinkage behavior of three soils has been examined.
Two natural soils, namely red soil and black cotton soil, and one artificially mixed soil sample of commercial bentonite with
well-graded sand, were studied. Compaction curve for Standard Proctor conditions were plotted and four compaction conditions
were selected. Experimental results showed that clay mineralogy dominates over compaction conditions in influencing the swelling
and shrinkage behavior of the tested soils. Monitoring of void ratio (e)−water content (w) relations during shrinkage showed
that soil specimens generally shrunk in three distinct linear stages. A small reduction in void ratio occurred on reduction
in water content during the first shrinkage stage and was termed as initial shrinkage. In second stage, void ratio decreased
rapidly with reduction in water content and was termed as primary shrinkage. In third and final stage, reduction in water
content is accompanied by a marginal change in void ratio and it’s called residual shrinkage. Irrespective of initial compaction
conditions studied, the transition from primary to residual shrinkage for all the specimens occurred within a narrow range
of water content (10–15%). |
| |
Keywords: | Clay mineralogy Maximum dry density Optimum moisture content Shrinkage Swelling |
本文献已被 SpringerLink 等数据库收录! |
|