Evaluation of Low Temperature Cracking Tests and Their Sensitivty to Asphalt Mixture Design Factors

Author(s): Hussain U. Bahia1, Andrew Hanz2, Tirupan Mandal3, and Remya Varma1
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: 576-587
Total Pages: 12
Language : English

Abstract: The Disc Compact Tension (DCT) Test (ASTM D7313) and the low temperature Semi-
Circular Bend (SCB) Test (AASHTO TP105) are two promising tests to characterize the low

temperature cracking resistance of asphalt mixtures using notched samples in bending. To
implement these tests into specifications, it is necessary to evaluate the sensitivity of the
response parameters measured to mix design factors. This paper includes analysis of results
from testing asphalt mixture samples with varying levels of recycled binder replacement,
binder modification, binder low temperature grades, mixture aging conditions, and fine
aggregate angularity. Statistical analysis show that fracture energy values measured by either
test is highly sensitive to variables controlled in this study, and that neither test is able to
differentiate the effects of mix design factors. Only a few factors are found marginally
significant, and the trends in the effects of the factors are sometimes found to be illogical.
These findings present major challenges in implementing these tests, and further the need for
modifying the testing procedures to better predict low temperature cracking of asphalt
mixtures.

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