Stiffness Modulus of Asphaltic Concrete Incorporating Coir Fibre and Subjected to Aging
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 degrees C and repeated load axial...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
2018
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| Subjects: | |
| Online Access: | View Fulltext in Publisher |
| Summary: | 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 degrees C and repeated load axial test at 40 degrees C. The results showed that the fibres improved the mixture's performance. The main findings obtained at 25 degrees 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. |
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| DOI: | 10.1051/e3sconf/20186502003 |