Behavior of Gilsonite-Modified Hot Mix Asphalt by Wet and Dry Processes

Quintana, Hugo Alexánder Rondón; Noguera, Jesús Alfredo Hernández; Bonells, Carlos Felipe Urazán

doi:10.1061/(asce)mt.1943-5533.0001339

Cited by 34 publications

(21 citation statements)

References 13 publications

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“…When aggregates are covered with Gilsonite modified bitumen, a notable interface is formed between the aggregate and the bitumen, thus, crack formation can be prevented in pavements [22]. It was also reported that Colombia Gilsonite, just as the Gilsonite from other countries, improved the high-temperature properties of HMAs [23]. In previous studies, it was reported that Iran Gilsonite was more effective in terms of resistance to fatigue and permanent deformations as compared to America Gilsonite [24,25].…”

Section: Introductionmentioning

confidence: 98%

Effects of Mixing Temperature on the Mechanical Properties of Hot Mix Asphalt

et al. 2019

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In this study, the effects of mixing temperature on the performance of hot mix asphalt (HMA) were investigated. 5% Styrene-butadiene-styrene (SBS) and 18% America Gilsonite were used as binder modifiers. HMA samples were prepared at the mixing temperatures 10°C, 15°C, and 20°C lower temperatures than the mixing temperature. Marshall Stability and flow, resistance to moisture-induced damage and indirect tensile fatigue tests were conducted on the hot mix asphalt samples. As a result of the experimental study, it was observed that use of additives increased the performance of the HMAs. In addition, it was seen that, in general, the stability, Marshall quotient, indirect tensile strength and fatigue life of the mixtures decreased and the flow values increased with decreasing mixing temperature.

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Section: Introductionmentioning

confidence: 98%

Effects of Mixing Temperature on the Mechanical Properties of Hot Mix Asphalt

et al. 2019

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“…In previous studies, it has been reported that the use of Gilsonite in bitumen modification has increased the viscosity and softening point of bitumen but decreased its ductility and penetration [13,14,22]. In some studies, it has been reported that Gilsonite reduced the temperature sensitivity by increasing the hardness of the bitumen, but it increased its elasticity [13,23]. In many studies it has been indicated that increasing the amount of Gilsonite in the bitumen increased the high temperature performance of the bitumen, but the tendency to fatigue and low-temperature cracking increased [11,[12][13][14][15]21,24].…”

Section: Introductionmentioning

confidence: 99%

“…In many studies it has been indicated that increasing the amount of Gilsonite in the bitumen increased the high temperature performance of the bitumen, but the tendency to fatigue and low-temperature cracking increased [11,[12][13][14][15]21,24]. However, Feng and Ameri have reported that the intermediate and high temperature performance of the modified bitumen with Gilsonite has improved [23]. The results of another study showed that Gilsonite, as a modifier, could be used to improve its stiffness properties and rutting resistance of mixtures used in hot climates [14].…”

Section: Introductionmentioning

confidence: 99%

Effects of Gilsonite on Performance Properties of Bitumen

et al. 2022

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The effectiveness of natural Gilsonite on the performance properties of modified bitumens was studied. Three samples having different ratios of Gilsonite that are 6%, 8% and 10% by weight of base bitumen which was PG 64-16 grade were prepared. The physical properties and storage stabilities of four samples were investigated by means of conventional tests. The short-term and long-term aging processes of bitumens were conducted with rolling thin oven and pressure aging vessel tests, respectively. Rheological properties of bitumens were examined by means of Superpave tests such as rotational viscosity, dynamic shear rheometer and bending beam rheometer. After the rheological study, the low and high temperature performance classes of bitumens were determined by the Superpave specification. The results showed that natural Gilsonite-modified bitumens provide improvement in rheological and physical properties of bitumen, and were found highly compatible with base bitumen. Gilsonite additive significantly increased stiffness and viscosity of bitumen, and improved the resistance against fatigue cracking and rutting of bitumen, without causing a reduction in thermal cracking resistance of bitumen.

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“…Gilsonite can be used in asphalt mixtures either by premixing with bitumen before blending with aggregates or blending directly with aggregates prior to addition of bitumen. It has been suggested that wet process modification provide more prominent effect on the mechanical properties of asphalt mixture (Quintana et al, 2016). Gilsonite increases the viscosity of bitumen and reduces its penetration.…”

Section: Introductionmentioning

confidence: 99%

Gilsonite Modified Asphalt for Use in Pavement Construction

Nasrekani¹,

Nakhaei²,

Naderi³

et al. 2018

American Journal of Engineering and Applied Sciences

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Properties such as durability and moisture resistance of asphalt concrete significantly improve pavement service life. When siliceous aggregate is used, then preventing moisture damage and stripping become distinctly required. Typically, stripping could be prevented by either using antistripping agents or by modifying the binders. The anti-stripping agent achieve its purpose by changing the aggregates' affinity for water through changing the zeta potential (promote bitumen adsorption due to negative surface charge). On the other hand, modifications of binders promote interface bonding between aggregate particles and bitumen. However, the process of applying anti-stripping agents or adhesion promoters is typically costly and, in some cases, may negatively impact other performance characteristics of pavement. Accordingly, this paper examines the merit of applying natural bitumen (gilsonite) instead of typically used anti-stripping chemicals in order to both promote resistance to moisture damage and reduce construction cost in asphalt. In addition to being quite low-cost, Gilsonite has a chemical composition nearly similar to that of petroleum based asphalt which makes it very compatible with asphalt binder.

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Behavior of Gilsonite-Modified Hot Mix Asphalt by Wet and Dry Processes

Cited by 34 publications

References 13 publications

Effects of Mixing Temperature on the Mechanical Properties of Hot Mix Asphalt

Effects of Mixing Temperature on the Mechanical Properties of Hot Mix Asphalt

Effects of Gilsonite on Performance Properties of Bitumen

Gilsonite Modified Asphalt for Use in Pavement Construction

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