Effect of Natural Rubber and Zycotherm on Moisture Performance of Asphalt Mixtures

Author(s): P Saha Chowdhury 1, Sonu Kumar 2 and D Sarkar3
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: 446-453
Total Pages: 8
Language : English

Abstract: Moisture damage is one of the major failure modes of the asphalt pavement. It weakens the
adhesion between the aggregates and asphalt binder, which in turn reduces the structural
strength of asphalt mixture. The objective of this study is to investigate the effect of
ZycoTherm and natural rubber modifier on the moisture performance of dense-graded asphalt
mixtures. The scope of the study includes experimental investigation on four different types
of dense-graded asphalt mixtures covering control, natural rubber modified (NR), warm
additive modified (WMA), and warm additive with natural rubber (WMA+NR) modified
asphalt mixtures. The experimental program encompassed moisture performance evaluation
of 72 specimens using Retained Stability test, Modified Lottman test, and Boiling Water test.
The experimental results reveal that NR and WMA+NR-mixes produce higher resistance to
moisture damages compared to the other mixtures. Furthermore, the inclusion of WMA
additive into the asphalt binder has not only reduced the mixing and compaction temperatures
but also increased resistance to moisture damage of the asphalt mixtures. Overall, it is
concluded that natural rubber and warm additives can be used to mitigate moisture damage of
dense-graded asphalt mixtures.

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