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.

View Book :- https://stm.bookpi.org/AAER-V1/article/view/327

Rutting and Fatigue Cracking Resistance of Waste Cooking Oil (WCO) Modified Trinidad Asphaltic Materials | Chapter 2 | New Ideas Concerning Science and Technology Vol. 4

 The issue of the disposal of waste cooking oil (WCO), a result of the frying and cooking activities at high temperatures produced mainly from the food industry, restaurants, hotels and residences has become a major environmental issue. In order to deduce the applicability of the WCO as a performance enhancer for the base asphalt, the effect of waste cooking oil (WCO) on the performance characteristics of asphaltic materials indigenous to Trinidad, namely Trinidad Lake Asphalt (TLA), Trinidad Petroleum Bitumen (TPB) and a TLA:TPB (50:50) blend, was investigated. As calculated by the rheological properties of complex modulus (G*) and phase angle (δ), the basic performance attributes of rutting resistance and fatigue cracking resistance were investigated. The results showed that an incremental decrease in rutting resistance (decrease in G*/sinδ values) resulted from the incremental addition of WCO to the three parent binders. However, an improvement in fatigue cracking resistance (decrease of G*sinδ value) resulted in the gradual addition of WCO in the three asphaltic binders. For the TLA:TPB (50:50) blends, the fatigue cracking resistance and rutting resistance (G*sinδ and G*/sinδ respectively) were among those of the blends containing TLA and TPB as the base binder. An rise in temperature resulted in decreases in the values of G*sinδ and G*/sinδ for the three asphaltic parent binders and all of the WCO modified asphaltic blends suggesting an increase in the resistance to fatigue cracking and a decrease in the rutting resistance with temperature. This study showed the ability to build tailored asphalt-WCO blends to suit particular applications and highlights the potential to be used by WCO as an environmentally attractive alternative to increase the use of asphaltic materials such as TLA and TPB from Trinidad.

Author (s) Details

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

Vitra Ramjattan-Harry
University of Trinidad and Tobago, Point Lisas Industrial Estate, Point Lisas, Trinidad and Tobago.

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

View Book :- https://stm.bookpi.org/NICST-V4/issue/view/13

Properties of Coir Fibre Reinforced Bituminous Mixes | Chapter 5 | Recent Developments in Engineering Research Vol. 9

The effect of Coir fibre on the rheological properties of asphaltic materials indigenous to Trinidad, namely Trinidad Lake Asphalt (TLA) and Trinidad Petroleum Bitumen (TPB), has been investigated for fatigue cracking and rutting resistance. This research provided strong rheological evidence for the ability to manufacture specially formulated TLA and TPB adapted Coir blends to meet unique applications. In general, TLA and TPB adjusted blends containing 10 mm fibres will have the highest resistance to fatigue cracking, but the lowest resistance to rutting, whereas blends with 2.5 mm fibres will have the lowest resistance to fatigue cracking, but the highest resistance to rutting. InThe fatigue cracking resistances of pure TLA and TPB were greater than those of the adjusted blends in terms of temperature susceptibility, with the exception of the 8 percent TLA Coir fibre blend that showed superior resistance to fatigue cracking between 60 and 70 ° C. In contrast to the pure binders, the TLA and TPB Coir modified blends were more resistant to rutting. Compared to unmodified parent binders, the 8 percent Coir fibre TLA blend demonstrated a degradation in rutting resistance between 60 ° C and 70 ° C. While studies have not yet been thoroughly conducted related to the quantification of greenhouse gas (GHG) emissions due to asphalt paving, improvements in rheological characteristics may lead to a he reduction in related emissions of GHGs from this energy-intensive sector.

Author (s) Details

Rehana Ali
University of Trinidad and Tobago, Point Lisas Industrial Estate, Point Lisas, Trinidad and Tobago.

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

Donnie Boodlal
University of Trinidad and Tobago, Point Lisas Industrial Estate, Point Lisas, Trinidad and Tobago.

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

View Book :- https://bp.bookpi.org/index.php/bpi/catalog/book/351