01090276

Component

Full-scale Accelerated Pavement Testing (APT) is an alternative to laboratory testing leading to advances in practice and economic savings for the evaluation of new pavement configurations, stress level related factors, new materials and design improvements. This type of testing closely simulates field conditions; however, it does not capture actual performance because of the limited ability to address long-term phenomena. Therefore, to fully utilize the benefits of APT, there is a need for a methodology to predict the long-term performance of in-service pavement structures from the results of APT tests that will account for such differences. The Bias Correction Factor (BCF) or Bias Correction Functions (BCFs) should account for all quantifiable differences between the fatigue life of the pavement site under APT and in-service conditions. The BCF represents an improvement of the currently used “shift factors” since they are more general and based on laboratory testing or computer simulation. By applying the proposed methodology, APT performance results from a structure similar to an in-service structure can be used to perform four-point bending beam tests and structural analysis to obtain an accurate estimate of the necessary Bias Correction Factor to estimate in-service performance.

01084478

08-1419

English

18p

2008

Transportation Research Board 87th Annual Meeting

DVD

Figures (8) ; References (19) ; Tables (2)

Accelerated tests; Fatigue strength; Field tests; Flexible pavements; Laboratory tests; Pavement design; Pavement management systems; Service life

Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways

Transportation Research Board Annual Meeting 2008 Paper #08-1419

TRIS, TRB

Jan 29 2008 3:46PM