TY  - JOUR
T1  - Influence of Nanosilica on Rheological Properties and Oxidative Aging of
Polymer Modified Bitumen
AU - Bala, Nura AU - Kamaruddin, Ibrahim AU - Napiah, Madzlan AU - Nahi, Mohammed Hadi 
JO  - Journal of Engineering and Applied Sciences
VL  - 12
IS  - 22
SP  - 5990
EP  - 5996
PY  - 2017
DA  - 2001/08/19
SN  - 1816-949x
DO  - jeasci.2017.5990.5996
UR  - https://makhillpublications.co/view-article.php?doi=jeasci.2017.5990.5996
KW  - Nanosilica
KW  -polyethylene
KW  -aging
KW  -rheology
KW  -bitumen
KW  -superpave requirements
AB  - In recent years, nanomaterials have led to promising developments in the improvement of pavement
performances. In this study, nanosilica was added to LLDPE polymer modified binder at concentration of 1-6%
by weight of bitumen binder. Characteristics of nanocomposite modified binders were evaluated using
conventional and Superpave binder test techniques. Penetration test, softening point test, Dynamic Shear
Rheometer (DSR) and Rolling Thin Film Oven Test (RTFOT) were used to analyze performance and rheological
properties of the nanocomposite modified binders. In addition, the aging resistance of nanocomposite modified
binders after RTFOT short term aging was evaluated through aging indices. The results show that, nanosilica
content has significant effect on polymer modified binder. Nanosilica composite modified binders penetration
decreases and softening point increases with increase in nanosilica, this implies enhancement in binders
hardness and stiffness. RTFOT aging indices evaluations show that, nanosilica composite modified binders
achieved the minimum superpave requirements; this implies that nanosilica reduces oxidative aging. The overall
findings show that, nanosilica protects the polyethylene polymer modified binder from binder from oxidative
aging.
ER  -