Exploration of Temperature and Loading Rate Interdependency for Fracture Properties of Asphalt Mixtures

Author(s): Katie E. Haslett , Eshan V. Dave and Jo S. Daniel
Paper category: Proceedings
Book title: Proceedings of the 71st RILEM Annual Week & ICACMS 2017,Chennai,India, 3rd -8th September 2017
Editor(s): Manu Santhanam
Ravindra Gettu
Radhakrishna G. Pillai
Sunitha K. Nayar
ISBN: 978-2-35158-196-4
ISBN: 978-2-35158-190-2 (Set)
e-ISBN: 978-2-35158-191-9:
Publisher: Published by RILEM Publications S.A.R.L.
Publication year: 2017
Pages: 546-555
Total Pages: 10
Language : English

Abstract: The importance of studying asphalt mixture fracture properties to improve cracking
performance, service life expectancy, and design effectiveness of roads is critical. The
increased use of Reclaimed Asphalt Pavement (RAP) in mix design requires improved
understanding of the effects of loading rate and temperature on fracture behavior. The
objective of this study was to assess interdependence of loading rate (time) and temperature
on asphalt fracture properties. Evaluation consisted of 5 mixtures from two regional sources:
Vermont and Virginia. Fracture tests were conducted through the Disk-shaped Compact
Tension (DCT) and the Semi-Circular Bending (SCB) geometries using varying loading rates
in effort to study the applicability of the time-temperature superposition principle.
Comparisons were made between 4 combinations of temperatures and loading rates. The goal
of this effort was to evaluate loading rate adjustments to compensate for changing test
temperature. Results indicated that linear viscoelastic time-temperature superposition is valid
in the pre-peak region of asphalt fracture behavior. SCB test results at lower test temperature
with an adjusted loading rate were able to match the pre-peak load-displacement behavior
however, had different post peak behavior. Further testing is proposed to develop a greater
understand of the ability to replicate post peak performance with adjusted loading rates and
temperatures.

Online publication : 2017
Publication type : full_text
Public price (Euros) : 0.00