Volume 20, Issue 53, January - June, 2023

Sensitivity of the dissipated energy of asphalt concrete to the testing environment

Saad Issa Sarsam^♦

Professor, Sarsam and Associates Consult Bureau (SACB), Baghdad-Iraq

^♦Corresponding author
Professor, Sarsam and Associates Consult Bureau (SACB), Baghdad Iraq

ABSTRACT

Asphalt concrete practices fatigue failure throughout its service life due to the dissipated energy. The service environment plays a major part in the control of the dissipated energy. The present work is concerned with monitoring the sensitivity of the asphalt concrete dissipated energy to the variation of microstrain level and the testing environment through the application of dynamic flexural stresses. Three microstrain levels (250, 400 and 750) have been implemented and two testing environments of (5 and 30) °C were used for monitoring the dissipated energy with the aid of four points repeated flexural stresses apparatus. Beam specimens of asphalt concrete were obtained from roller compacted slab samples. The asphalt concrete Specimens have practiced the repeated flexural stresses under constant strain levels. It was observed that higher microstrain level exhibit lower fatigue life and higher dissipated energy regardless of the testing temperature. It was concluded that higher testing temperature exhibit higher dissipated energy regardless of the microstrain level.

Keywords: Asphalt concrete, Testing environment, Microstrain level, Dissipated Energy

Indian Journal of Engineering, 2023, 20(53), e7ije1007

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DOI: https://doi.org/10.54905/disssi/v20i53/e7ije1007

Published: 09 March 2023