Abstract
Analysis of Strength Reduction of Sub-grade Clay with Increasing Soaking Time
Highlights
The water content of a fine grained soil as clay has a significant effect on its strength and on its compressibility characteristics [1]
The Modified Proctor test was performed in order to find the optimum moisture content OMC of the soil giving the maximum dry density MDD which will be used to compact the soil for the California Bearing Ratio (CBR) test
Modified Proctor test After computing the water content of the soil samples when arrived to laboratory, we performed the Modified Proctor test according to ASTM Standard D1557-12 [8]
Summary
The water content of a fine grained soil as clay has a significant effect on its strength and on its compressibility characteristics [1]. Surface and subsurface drainage of road pavement and from adjoining land affect significantly sub-grade strength [4] and its resilient modulus [5] This gives a high importance on the effect of the soaking period on the CBR value of soil. We collected nine clayey samples from different Lebanese zones These soils were subjected to two set of experiments, the main experiments and the identification experiments. Modified Proctor test After computing the water content of the soil samples when arrived to laboratory, we performed the Modified Proctor test according to ASTM Standard D1557-12 [8]. CBR test Once the Modified Proctor tests were done, we performed the CBR test on soils compacted under OMC according to ASTM Standard 1883 [9]. The violet one is for CBR of soil with 8 days soaked
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