A Disaster Resilient Road: Effects of Fines on Density and Shear Strength of Sands
International Journal of Transportation Engineering and Technology
Volume 6, Issue 2, June 2020, Pages: 38-43
Received: Mar. 2, 2020;
Accepted: Mar. 16, 2020;
Published: Apr. 23, 2020
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Md. Shahin, Department of Disaster Resilience and Engineering, Patuakhali Science and Technology University, Patuakhali, Bangladesh
Md. Mehedi Hasan Khan, Local Government Engineering Department, Dhaka, Bangladesh
Md. Niamul Bari, Department of Civil Engineering, Rajshahi University of Engineering and Technology, Rajshahi, Bangladesh
During a massive flood or earthquake, the roads are mainly damaged due to the looseness of the subgrades. In recent times for any new constructions of roads and embankments the subgrades mainly constructed with the sand filling. It is difficult to achieve the desired degree of compaction beyond a certain limit. That’s why the bases (subgrades) become loose. This study aims to overcome the situation by increasing compaction and shear strength properties of sand filling. In this paper, an intensive laboratory investigation of fines with sands is investigated by a series of the proctor test and direct shear test. In this study, fines were mixed with the sand samples in a proportion of 10%, 20%, 30%, 45% and 55% to examine the effect on maximum dry density. Tests indicated that 45 to 55% fines with sands having different Fineness Modulus (FM), the Maximum Dry Density (MDD) of the sand can be increased up to 18 to 26% depending on FM. The results revealed that the density and shear strength (cohesion) of sand both increase significantly with the addition of fines with it up to a certain percentage. This increment in MDD and shear strength makes the bases (subgrades) stronger and stable. This result can be used in disaster resilient road or embankment construction and also for the structures having a shallow foundation.
Md. Mehedi Hasan Khan,
Md. Niamul Bari,
A Disaster Resilient Road: Effects of Fines on Density and Shear Strength of Sands, International Journal of Transportation Engineering and Technology.
Vol. 6, No. 2,
2020, pp. 38-43.
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