Fatigue Life Evaluation of Flexible Pavement

Safwat F. Said ； Hassan Hakim ； Håkan Carlsson ； Leif G. Wiman

《International Journal of Pavement Research and Technology》 4卷2期 (2011/03) Pp. 80-88

https://doi.org/10.6135/ijprt.org.tw/2011.4(2).80

並列摘要

Predicting the fatigue life or remaining life of existing roads will lead to greater opportunities to use contracts related to performance-based parameters (mechanical properties of pavement layers). In 1996, a test road was built on the E6 motorway with several observation road sections. After 10 years of traffic, two pavement structures with different types of bituminous layers were evaluated in regard to fatigue cracking. One of the structures is based on the idea of using the stone mastic asphalt (SMA) principle for all bituminous bound layers, while the other is a reference section with a conventional road base mix. A procedure for fatigue life prediction was developed based on the stiffness and fatigue properties of cored samples, falling weight deflectometer (FWD) deflections, field temperature data, and traffic monitoring at the site. It was concluded that the procedure can be useful for evaluating the material characteristics' impact on the fatigue life of flexible pavement and in turn the connection between mix properties and pavement design. It is demonstrated that pavement performance can be significantly prolonged by choosing bituminous layers with adequate mechanical properties. It is also shown that a reasonable estimation of the remaining life of flexible pavement can be forecast.

並列關鍵字

Fatigue life ； Flexible pavement ； FWD ； Residual value ； Stiffness modulus