Feasibility of Lightweight Deflectometer Measured Surface Deflection on Flexible Pavement for Quality Assessment

International Journal of Civil Engineering

© 2020 by SSRG - IJCE Journal

Volume 7 Issue 7

Year of Publication : 2020

Authors : Vishal Kumar Narnoli, Sanjeev Kumar Suman

10.14445/23488352/IJCE-V7I7P110

How to Cite?

Vishal Kumar Narnoli, Sanjeev Kumar Suman, "Feasibility of Lightweight Deflectometer Measured Surface Deflection on Flexible Pavement for Quality Assessment," SSRG International Journal of Civil Engineering, vol. 7,  no. 7, pp. 73-82, 2020. Crossref, https://doi.org/10.14445/23488352/IJCE-V7I7P110

Abstract:

In this study, a lightweight deflectometer (LWD) is used to measure the surface deflection of the flexible pavement in Bihar; India. An LWD field-testing program was undertaken on 30 test locations of all four roads for relative condition assessment. The surface deflection obtained by using a 150 mm diameter plate was found to be 1.5 - 1.8 times higher than the surface deflection obtained by using 300 mm diameter plates. The coefficient of variation (COV) of the surface deflection ranges from 9 to 15% and 7 to 27% in the case of 300 mm and 150mm diameter plate respectively. The result shows all the deflection datasets are normal. The control chart shows the uniformity of data except for a few sections of roads. The LWD device was found to provide quick test results and simple to operate on any pavement, and hence the frequency of deflection tests can be increased, leading to an improvement in the overall quality of pavement and, thus, pavement performance.

Keywords:

LWD, surface deflection, flexible pavement, descriptive statistics, normality check, uniformity check

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