Study on the Asphalt Pavement Response in the Accelerated Pavement Testing Facility

Research output: Chapter in Book/Conference proceedings/Edited volumeChapterScientificpeer-review

Abstract

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.

Original languageEnglish
Title of host publicationProceedings of the 9th International Conference on Maintenance and Rehabilitation of Pavements—Mairepav9
EditorsC. Raab
Place of PublicationCham
PublisherSpringer Open
Pages871-880
Number of pages10
ISBN (Electronic) 978-3-030-48679-2
ISBN (Print)978-3-030-48678-5
DOIs
Publication statusPublished - 2020
Event9th International Conference on Maintenance and Rehabilitation of Pavements - Empa, Zurich, Switzerland
Duration: 1 Jul 20203 Jul 2020
https://mairepav2020.empa.ch/

Publication series

NameLecture Notes in Civil Engineering
Volume76
ISSN (Print)2366-2557
ISSN (Electronic)2366-2565

Conference

Conference9th International Conference on Maintenance and Rehabilitation of Pavements
Abbreviated titleMairepav9
CountrySwitzerland
CityZurich
Period1/07/203/07/20
Internet address

Keywords

  • Accelerated pavement test
  • Asphalt
  • Cyclic Indirect Tensile Test
  • Mechanical response

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