Abstract
The effects of interface condition on the life of flexible pavements have been determined. The methodology consists of implementing a previously derived interface constitutive model into the Kenlayer programme to compute the stresses and strains in typical flexible road structures. The shell transfer functions for fatigue cracking and terminal serviceability were used to estimate the pavement life. The behaviour of in‐service pavements indicates that the condition of the bonding between pavement layers plays an important role in the road structures performance. Premature failure of road sections due to layer separation, leading to redistribution of stresses and strains in the pavement structure, is often encountered, especially in areas where the vehicles are more likely to apply horizontal forces. In computing the critical stresses and strains, most of the mechanistic design procedures of flexible pavement structures consider that pavement layers are completely bonded or completely unbounded.
Highlights
This paper presents a study on the behaviour of interface condition for asphalt pavement structures
This study focuses on the strain dependency on the interface condition, being the most interesting and important part of the structure
It presents the mechanical of tack coat and seal coat materials with a special emphasis on determining its resilient modulus and permanent bend, which is achieved by a proper material characterisation of the interface condition
Summary
This paper presents a study on the behaviour of interface condition for asphalt pavement structures. The statement presents the mechanical and practical properties of tack coat and seal coat materials with a special regard to the determination of its resilient modulus and the permanent deformation, and by a proper material characterisation of the unbound bases. This study focuses on the strain dependency on the interface condition, being the most interesting and important part of the structure It presents the mechanical of tack coat and seal coat materials with a special emphasis on determining its resilient modulus and permanent bend, which is achieved by a proper material characterisation of the interface condition. For modelling the non-linear behaviour granular base, asphalt layer and interface condition, Kenlayer provided excellent opportunities, not in use of the Iranian pavement designing procedure for the moment
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