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Performance of dense graded asphaltic concrete using nanosilica modified bitumenc

Arshad, A. K. and Shaffie, E. and K. A., Masri and Hashim, W. and Rahman, Z. A. (2019) Performance of dense graded asphaltic concrete using nanosilica modified bitumenc. In: IOP Conference Series: Materials Science and Engineering, 10th Malaysian Road Conference & Exhibition 2018, 29-31 October 2018 , Selangor, Malaysia. pp. 1-10., 512 (012061). ISSN 1757-8981 (Print), 1757-899X (Online)

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Abstract

Flexible pavements are constructed to last for its design life, therefore, a good and durable asphalt surface layer is required. However, flexible pavements using dense graded asphaltic concrete have some shortcomings such as prone to rutting when heavy loads are applied at high ambient temperatures. One of the ways to improve the performance of dense graded asphaltic concrete is to modify the bitumen using nanosilica. Among the properties of nanosilica that is advantageous to improve the bitumen is strong absorption, large surface area and excellent stability. The objective of this study is to investigate the use of nanosilica as a bitumen modifier to improve the moisture susceptibility and rutting resistance of dense graded asphaltic concrete. Bitumen PEN 60/70 was modified with nanosilica at 2% by weight of bitumen. The performance of the asphaltic concrete specimens was then evaluated in terms of its moisture susceptibility, resilient modulus and rutting resistance. The results obtained from the testing showed that the addition of nanosilica increased the resilient modulus value and reduced the rutting depth of dense asphaltic concrete mixes, while achieving the required moisture resistance. It concludes that the addition of nanosilica in the bitumen improved the performance of dense asphaltic concrete mix.

Item Type: Conference or Workshop Item (Lecture)
Additional Information: Indexed by Scopus
Uncontrolled Keywords: Asphalt surface layer; Flexible pavements; Large surface area; Moisture resistance; Moisture susceptibility; Resilient modulus; Rutting resistance; Strong absorptions
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TE Highway engineering. Roads and pavements
Faculty/Division: Faculty of Civil Engineering & Earth Resources
Depositing User: Mrs Norsaini Abdul Samat
Date Deposited: 20 Dec 2019 08:40
Last Modified: 20 Dec 2019 08:40
URI: http://umpir.ump.edu.my/id/eprint/26232
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