Investigation on Rutting and Fatigue Cracking Susceptibility of Polystyrene Modified Asphalt | Chapter 1 | Advanced Aspects of Engineering Research Vol. 1

 In asphalt technology, rutting and fatigue cracking are significant rheological and performance indicators. Waste polymeric materials have shown promise as modifiers for improving the efficiency of asphalt pavement materials. The lack of research into the impact of waste polystyrene (PS) on the performance characteristics of rutting resistance and fatigue cracking resistance of the indigenous asphaltic materials Trinidad Lake Asphalt (TLA) and Trinidad Petroleum Bitumen (TPB) has hampered the use of PS as a performance enhancer, as seen with other asphalts from various sources, and has also hampered the development of PS as a performance enhancer. By measuring the rheological properties of complex modulus (G*) and phase angle () of prepared blends and calculating the fatigue cracking resistance and rutting resistance parameters (G*sin and G*/sin, respectively), the effect of PS on TLA and TPB was investigated. When compared to the pure TPB binder, the addition of PS to TLA resulted in an improvement in fatigue cracking and rutting resistance. Despite the fact that PS added to the TPB blends improved rutting resistance, the fatigue cracking resistance of the TPB parent binders was superior to the PS adjusted TPB blends. The incremental increase in temperature for TPB and TLA-based blends resulted in gradual improvements in fatigue cracking resistance but gradual deterioration in rutting resistance. Both the Research Program Superpave and the Strategic Highway Research Program requirements came to the same conclusion. There is clear rheological evidence that waste PS can be used as an asphalt efficiency enhancer for both TLA and TPB, resulting in a long-term waste PS reuse strategy.

Author (s) Details

Nazim Mohamed
University of Trinidad and Tobago, Point Lisas Industrial Estate, Point Lisas Trinidad & Tobago, W. I.

Demitri Ramlochan
University of Trinidad and Tobago, Point Lisas Industrial Estate, Point Lisas Trinidad & Tobago, W. I.

Rean Maharaj
University of Trinidad and Tobago, Point Lisas Industrial Estate, Point Lisas Trinidad & Tobago, W. I.

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