Open AccessNano-Silica modifier asphalt concrete under rutting resistance and shape memory component
Author(s) -
A. A. Mohammed,
P M Mwangi,
Mohd. Anwar,
Lau Teck Leong,
J. Jayaprakash,
P. J. Ramadhansyah,
Zul Fahmi Mohamed Jaafar,
Nordiana Mashros
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/682/1/012041
Subject(s) - rut , asphalt , materials science , cracking , deformation (meteorology) , composite material , fatigue cracking , asphalt pavement , nano , geotechnical engineering , geology
Permanent deformation is pavement distress that has been the root cause of failure of roads globally. With the formation of a rut, follows cracking which inevitably damages the asphalt and sub-base layers. To curb the rutting distress, this study investigates the use of nanosilica, miniaturized silica particles to the power of 10-9 to modify the binder of the asphalt concrete. The nano-silica was added at 4%, 6% and 15% by weight of bitumen into the asphalt mixture. Marshall Mix design method was used to prepare the forty-eight samples used in the study. Repeated Load Permanent Deformation (RLPD) test and Shape Memory (SM) were performed at two temperatures (25°C and 40°C). It was found that the rutting resistance and shape memory had the best performance with the addition of 15% nano-silica at 40°C. Addition of nano-silica at 15% by weight of bitumen had the best amelioration of not only permanent deformation resistance but also shape retention thus enhancing pavement performance.