Volume 59, Issue 325, January 2023

Thermal behavior of asphalt concrete under various microstrain levels

Saad Issa Sarsam^♦

Professor, Sarsam and Associates Consult Bureau (SACB), Baghdad- IRAQ. Former Head, Department of Civil Engineering, College of Engineering, University of Baghdad, Iraq

^♦Corresponding author
Professor, Sarsam and Associates Consult Bureau (SACB), Baghdad- IRAQ. Former Head, Department of Civil Engineering, College of Engineering, University of Baghdad, Iraq

ABSTRACT

Deterioration of asphalt concrete through the service life is related to the vehicular loading and environment impact. The present work assessed the influence of microstrain level and environment on the permanent microstrain and fatigue life of asphalt concrete. Beam specimens obtained from laboratory prepared slab samples of asphalt concrete were tested under dynamic flexural stresses under three microstrain levels of (750, 400 and 250). Two testing temperatures have been implemented, (5 and 30)?. The permanent deformation in terms of microstrain was monitored. It was detected that the permanent microstrain increases by (153, 33.3 and 56.2,) % under microstrain levels of (750, 400 and 250) respectively at a testing environment of 30 ? as compared with that at testing environment of 5 ?. It was revealed that the fatigue life increases by (12.3, 2.3, 14 and 12.3) folds under microstrain levels of (750, 400 and 250) respectively when the testing environment rises from (5 to 30)?.

Keywords: Environment, Asphalt concrete, Deformation, Microstrain level, Dynamic Flexure

Discovery, 2023, 59, e11d1004

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Published: January 2023