Evaluation of FWD Load Transfer Efficiency Measurement

GERGIS W. WILLIAM, SAMIR N. SHOUKRY

Abstract


This paper presents an evaluation of load transfer efficiency (LTE) of dowel jointed concrete pavements. Measurement of load transfer efficiency of transverse joints in concrete pavements is universally conducted using Falling Weight Deflectometer (FWD). LTE is an important parameter affecting pavement performance. Due to the importance of the results for maintenance decisions, the accuracy of the measurement technique is investigated. For this purpose, FWD tests were conducted on instrumented rigid pavement section in West Virginia at different times. The state of deformation of the slabs are continuously monitored, through dowel bar bending measurements and records of the temperature gradient profiles across the slab thickness, as well as joint openings every 20 minutes. Transverse joints were tested along the slab edges as well as along the wheel-path. Trend analysis was performed to evaluate the effect of design features and site conditions on LTE.

Keywords


Dowel bars, Transverse joints, Load Transfer Efficiency, FWD, Rigid PavementsText


DOI
10.12783/dtetr/ecae2018/27722

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