Author(s): Rumi Sutradhar and Arpan Laskar

Abstract: Pavement shoulder exhibits a high impact on the overall performance of a road, as it protects the pavement edges from deterioration. A stable shoulder provides lateral support to the pavement structure, whereas, an unstable shoulder weakens the pavement edges and results in different types of pavement failures. In this present study, an attempt is taken to improve the stability of the pavement shoulder and to analyse the effect of impact load on the treated as well as untreated shoulder sections. Natural fibres are quite effective to improve the stability of subgrade soil. Locally available low-cost natural fibres viz. Jute fibre and Bamboo fibre are used in the study to stabilize the shoulder section. The study is conducted considering the specifications of flexible pavement constructed in rural roads in Tripura, India. Falling Weight Deflectometer (FWD) test is carried out to analyse the behaviour of the treated shoulder section under the specific impact load applied by the instrument. Maximum 53.39% and 68.14% reduction in vertical deflection may be possible by treating the shoulder section using jute fibre and bamboo fibre respectively. A deflection profile curve is also evaluated following the trend of vertical deflection on the shoulder section.

DOI: 10.22271/27078264.2025.v6.i1a.74

Pages: 01-08 | Views: 132 | Downloads: 59

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