Rutting and Fatigue Cracking Resistance of Waste Cooking Oil (WCO) Modified Trinidad Asphaltic Materials

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Rutting and Fatigue Cracking Resistance of Waste Cooking Oil (WCO) Modified Trinidad Asphaltic Materials

February 15, 2021 Science and Technology 0

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.

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