Accelerated pavement testing (APT) is an effective method in evaluating pavement performance by applying wheel loading and speed under controlled conditions. This study aims to investigate the effects of wheel loading, speed and ambient temperature on the pavement responses at different directions and depths of pavement structure. A two-layer asphalt pavement structure was constructed on a base layer constructed 10 years ago. Strain gauges were installed both in the transversal and longitudinal directions of motion on the bottom of both layers. The response of the asphalt layers was monitored and the developed strains were recorded. The results show that maximum compressive strain increases with wheel load. In contrast, the maximum tensile strain decreases as load increases; this is probably due to the high confining pressure that occurs within the pavement structure when higher wheel load is applied. The maximum compressive and tensile strains decrease with wheel speed, because the asphalt mixture becomes stiffer at high wheel speed (frequency). The maximum compressive and tensile strains in the transversal direction increase with ambient temperature, because of the low stiffness of asphalt materials at high temperature, which appears to be the cause of rutting.
|Title of host publication||Proceedings of the 9th International Conference on Maintenance and Rehabilitation of Pavements—Mairepav9|
|Place of Publication||Cham|
|Number of pages||10|
|Publication status||Published - 2020|
|Event||9th International Conference on Maintenance and Rehabilitation of Pavements - Empa, Zurich, Switzerland|
Duration: 1 Jul 2020 → 3 Jul 2020
|Name||Lecture Notes in Civil Engineering|
|Conference||9th International Conference on Maintenance and Rehabilitation of Pavements|
|Period||1/07/20 → 3/07/20|
Bibliographical noteGreen Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.
- Accelerated pavement test
- Cyclic Indirect Tensile Test
- Mechanical response