Limits...
Rutting and Fatigue Cracking Resistance of Waste Cooking Oil Modified Trinidad Asphaltic Materials.

Maharaj R, Ramjattan-Harry V, Mohamed N - ScientificWorldJournal (2015)

Bottom Line: The influence 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 TLA : TPB (50 : 50) blend, was investigated to deduce the applicability of the WCO as a performance enhancer for the base asphalt.The rheological properties of complex modulus (G (∗) ) and phase angle (δ) were measured for modified base asphalt blends containing up to 10% WCO.The results of rheology studies demonstrated that the incremental addition of WCO to the three parent binders resulted in incremental decreases in the rutting resistance (decrease in G (∗) /sinδ values) and increases in the fatigue cracking resistance (decrease in G (∗) sinδ value).

View Article: PubMed Central - PubMed

Affiliation: The University of Trinidad and Tobago, Point Lisas Industrial Estate, Couva, Trinidad and Tobago.

ABSTRACT
The influence 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 TLA : TPB (50 : 50) blend, was investigated to deduce the applicability of the WCO as a performance enhancer for the base asphalt. The rheological properties of complex modulus (G (∗) ) and phase angle (δ) were measured for modified base asphalt blends containing up to 10% WCO. The results of rheology studies demonstrated that the incremental addition of WCO to the three parent binders resulted in incremental decreases in the rutting resistance (decrease in G (∗) /sinδ values) and increases in the fatigue cracking resistance (decrease in G (∗) sinδ value). The fatigue cracking resistance and rutting resistance for the TLA : TPB (50 : 50) blends were between those of the blends containing pure TLA and TPB. As operating temperature increased, an increase in the resistance to fatigue cracking and a decrease in the rutting resistance were observed for all of the WCO modified asphaltic blends. This study demonstrated the capability to create customized asphalt-WCO blends to suit special applications and highlights the potential for WCO to be used as an environmentally attractive option for improving the use of Trinidad asphaltic materials.

No MeSH data available.


Related in: MedlinePlus

Black curves for WCO modified TPB blends measured at 1.59 Hz and 60°C.
© Copyright Policy - open-access
Related In: Results  -  Collection


getmorefigures.php?uid=PMC4537772&req=5

fig10: Black curves for WCO modified TPB blends measured at 1.59 Hz and 60°C.

Mentions: In addition to the analysis performed using the Strategic Highway Research Program presented above, the results can also be analysed utilizing the alternative rheology-performance relationship described by the Asphalt Research Program Superpave specification [10]. This approach recommends a high G∗ (stiffness) but low δ (elastic) structure to reduce rutting and low values of G∗ and δ to reduce the fatigue cracking. The graphical variation of G∗ with δ is referred to as a black curve; that is, “a series of bitumens differing in penetration but not temperature susceptibility (penetration index) will give a single black curve” [20, 22]. The deviations from this base curve indicate changes in composition or structure caused by processing, ageing, or polymer addition. The black curves obtained in this study for the three asphaltic binders and their various WCO modified blends at a frequency of 1.59 Hz at a temperature of 60°C using the Asphalt Research Program Superpave specification are depicted in Figures 9–11.


Rutting and Fatigue Cracking Resistance of Waste Cooking Oil Modified Trinidad Asphaltic Materials.

Maharaj R, Ramjattan-Harry V, Mohamed N - ScientificWorldJournal (2015)

Black curves for WCO modified TPB blends measured at 1.59 Hz and 60°C.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4537772&req=5

fig10: Black curves for WCO modified TPB blends measured at 1.59 Hz and 60°C.
Mentions: In addition to the analysis performed using the Strategic Highway Research Program presented above, the results can also be analysed utilizing the alternative rheology-performance relationship described by the Asphalt Research Program Superpave specification [10]. This approach recommends a high G∗ (stiffness) but low δ (elastic) structure to reduce rutting and low values of G∗ and δ to reduce the fatigue cracking. The graphical variation of G∗ with δ is referred to as a black curve; that is, “a series of bitumens differing in penetration but not temperature susceptibility (penetration index) will give a single black curve” [20, 22]. The deviations from this base curve indicate changes in composition or structure caused by processing, ageing, or polymer addition. The black curves obtained in this study for the three asphaltic binders and their various WCO modified blends at a frequency of 1.59 Hz at a temperature of 60°C using the Asphalt Research Program Superpave specification are depicted in Figures 9–11.

Bottom Line: The influence 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 TLA : TPB (50 : 50) blend, was investigated to deduce the applicability of the WCO as a performance enhancer for the base asphalt.The rheological properties of complex modulus (G (∗) ) and phase angle (δ) were measured for modified base asphalt blends containing up to 10% WCO.The results of rheology studies demonstrated that the incremental addition of WCO to the three parent binders resulted in incremental decreases in the rutting resistance (decrease in G (∗) /sinδ values) and increases in the fatigue cracking resistance (decrease in G (∗) sinδ value).

View Article: PubMed Central - PubMed

Affiliation: The University of Trinidad and Tobago, Point Lisas Industrial Estate, Couva, Trinidad and Tobago.

ABSTRACT
The influence 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 TLA : TPB (50 : 50) blend, was investigated to deduce the applicability of the WCO as a performance enhancer for the base asphalt. The rheological properties of complex modulus (G (∗) ) and phase angle (δ) were measured for modified base asphalt blends containing up to 10% WCO. The results of rheology studies demonstrated that the incremental addition of WCO to the three parent binders resulted in incremental decreases in the rutting resistance (decrease in G (∗) /sinδ values) and increases in the fatigue cracking resistance (decrease in G (∗) sinδ value). The fatigue cracking resistance and rutting resistance for the TLA : TPB (50 : 50) blends were between those of the blends containing pure TLA and TPB. As operating temperature increased, an increase in the resistance to fatigue cracking and a decrease in the rutting resistance were observed for all of the WCO modified asphaltic blends. This study demonstrated the capability to create customized asphalt-WCO blends to suit special applications and highlights the potential for WCO to be used as an environmentally attractive option for improving the use of Trinidad asphaltic materials.

No MeSH data available.


Related in: MedlinePlus