Immediate and long term effects of compaction on the stress-strain behaviour of soil

[摘要] This paper explores whether delay in construction after compaction can benefit from the gain in soil's strength and stability point of view. An experimental investigation has been carried out to examine the gradual development of soil's shear strength by ageing of mechanically compacted soil at three relative densities. In order to separate the gain in strength due to ageing from that occurring from the reduction in soil moisture, the soil samples prepared in moulds were kept in desiccators for different periods of time (1, 9 and 17 days) before testing unconfined compressive strength test. The soil in densely compacted state is found to gain in strength due to ageing faster than that in medium compacted state. Only due to ageing of 9 days or more, unconfined compressive strength of compacted soil is found about 1.7 to 2.4 times of that attained in day 1 after compaction.

[发布机构] Department of Civil Engineering, University of Asia Pacific, Dhaka, Bangladesh^1;Department of Civil Engineering, Military Institute of Science and Technology, Dhaka, Bangladesh^2

[效力级别] 运输工程

[关键词] Compacted soil;Compacted state;Experimental investigations;Long-term effects;Relative density;Soil sample;Stress strain behaviours;Unconfined compressive strength