Falling Weight Deflectometer Analysis of Low Volume Roads

Shrikant Madhav Harle,Prakash Pajgade

doi:10.11648/j.jccee.20190404.11

Abstract

The work was carried out on the village roads where the traffic intensity is very low. The roads should be constructed as durable and with minimum construction cost without affecting the strength. Therefore the experiments were carried out on different types of roads. The experiments can be performed in the laboratory but that is not sufficient and therefore the tests should also be performed on the actual constructed pavement patches. The non destructive test is the best way to check the parameters responsible for the effectiveness of pavement. The non destructive testing machines like ground penetrating radar (GPR) and falling weight deflectometer is used to assess different parameters of pavements. The subgrade moduli is also compared with the help of these machines. The falling weight deflectometer (FWD) was carried out on the plastic cell filled concrete block pavement (PCCBP), Geocell filled concrete concrete block pavement (GCCBP) and grouted macadam (GM). The deflection, modulus of elasticity, strain, thickness calculation, area, RRS were calculated through this test by the back calculation. From this observation it is found that the geocell filled concrete block pavement performed well as compared to the other pavements in terms of the calculated parameter. The deflection was more in the grouted macadam when compared with the PCCBP and GCCBP.

Highlights

The geocells are used for the pavement applications like the pavements subjected to repeated loadings
Falling Weight Deflectometer (FWD) is an impulseloading device in which a transient load is applied to the pavement and the deflected shape of the pavement surface is measured
A falling weight deflectometer (FWD) is a testing device to evaluate the physical properties of pavement [1013]

Summary

Introduction

The geocells are used for the pavement applications like the pavements subjected to repeated loadings. Falling Weight Deflectometer (FWD) is an impulseloading device in which a transient load is applied to the pavement and the deflected shape of the pavement surface is measured. A falling weight deflectometer (FWD) is a testing device to evaluate the physical properties of pavement [1013]. FWD data is primarily used to estimate pavement structural capacity for overlay design falling weight deflectometer (FWD) enables researchers to perform nondestructive, quick, and dynamic evaluations of paved surfaces, aggregate sub-bases, and soil subgrades without leaving the testing vehicle.

Results

Conclusion