Stiffness Modulus of Asphaltic Concrete Incorporating Coir Fibre and Subjected to Aging

• Published in: E3S Web of Conferences
• Main Author: Mohammed A.A.; Putra Jaya R.; Marie Delbrel E.J.; Wee Kang C.; Ti Kok S.; Yaacob H.; Abdul Hassan N.; Abdul Hamid N.H.; Ramli N.I.
• Format: Conference paper
• Language: English
• Published: EDP Sciences 2018
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85059140623&doi=10.1051%2fe3sconf%2f20186502003&partnerID=40&md5=546b831738374c1d8a7a173912582ac6

The aim of this paper is to investigate the performance response of a set of coir fibre modified asphalt samples subjected different ageing conditions and containing three different fibre contents. The laboratory experimental programs are indirect tensile test at 25°C and repeated load axial test at 40°C. The results showed that the fibres improved the mixture's performance. The main findings obtained at 25°C for short and long-term ageing reveal that low fibre content at around 0.3% per aggregate weight display a stiffness modulus up to 14% higher than that of unmodified mixtures, hence showing that fibres may improve the bearing capacity and rut-resistance of asphalt mixtures. Conversely, as the amount of fibre increases to 0.5% and 0.7%, the stiffness decreases to the point of becoming unacceptably low, almost 80% lower than unmodified mixes stiffness. However the data also reveal that high fibre contents at 0.5% and above completely neutralize the impact of ageing on the mixture, indicating that fibre-modified mixtures would yield longer lives. © The Authors, published by EDP Sciences, 2018.