Abstract
In concrete pavement, load transfer through the natural mechanism of interlocking action of the aggregate particles has been found to be effective for moderate to low traffic volume roads. This paper investigates the influences of some of the joint-related parameters (e.g., roughness, crack width and aggregate size) and pavement-related parameters (e.g., slab depth and modulus of subgrade reaction) on the load transfer efficiency (LTE) of an aggregate interlocked joint in concrete pavement. A three-dimensional finite element analysis of a jointed concrete pavement has been carried out. An aggregate interlocked joint with irregular fractured surfaces has been modeled in this work. The nature of the fractured surfaces or its roughness influences the LTE of the joint. The effects of varied roughness, crack widths and maximum aggregate size on the LTE of a joint have been investigated in the present work. It has been found that LTE increases with increase in roughness levels for all aggregate sizes and crack widths. The effects of depth of concrete slab and modulus of subgrade reaction on LTE have also been investigated. LTE has been found to increase with increase in slab depth; whereas it decreases with increase in the modulus of subgrade reaction.
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