Showing papers by "Delwyn G. Fredlund published in 2017"
TL;DR: In this article, the hydraulic properties of the vegetated soil with two types of grass (Bermuda grass and Vetiver grass) under unsaturated conditions were investigated and the results showed that the hydraulic conductivity of the soil with Bermuda grass was smaller than that of the bare soil.
40 citations
19 Jan 2017
TL;DR: In this paper, a series of compaction curves obtained in fine-grained soil through use of a gyratory compactor were compared with those obtained using traditional compaction (Proctor standard and modified compaction), and the results indicated that unconfined compression strength and resilient modulus are related to the compaction method when samples are compacted at water content below optimum.
Abstract: The authors present a series of compaction curves obtained in fine-grained soilsthrough use of a gyratory compactor. The effect on compaction curves of variables such as vertical pressure, angle of gyration, and speed of gyrationis shown. The curves obtained with the gyratory compactor were compared with those obtained using traditional methods of compaction (Proctor standard and modified compaction). It was observedthat the standard compaction curve can be obtained with 200 gyrations, 1.25 degrees of angle of gyration, and a vertical pressure of 200 kPa.On the other hand, with the combination of variables studied in this research, modified compaction curvescould not be reached. Tests were also performed to measure resilient modulus and unconfined compression strength onspecimens prepared at optimum compaction conditions, 2% below the optimum and 2% above the optimum (for Proctor standard tests) using two methodsof compaction.The results indicate that unconfined compressionstrengths and resilient modulus are related to the compaction method when samples are compacted at water content below optimum.