Characterization of Asphalt Binders Based on Chemical and Physical Properties

Wei, Jianming; Shull, Jeffrey C.; Lee, Yong Joon; Hawley, Martin C.

doi:10.1080/10236669608032753

Cited by 33 publications

(15 citation statements)

References 2 publications

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“…The rate depends on the composition of the asphalt and the temperature. Oxidation is the major factor responsible for the irreversible hardening of asphalts (6,7,12).…”

Section: Background Aging Process In Asphalt Bindermentioning

confidence: 99%

“…In chemical terms, aging first leads to a decrease in aromatic content and subsequently to an increase in resin content, together with a higher asphaltene content (7). However, testing of aged asphalt alone does not appear to be adequate for predicting mixture performance, because of the apparent mitigating or catalytic effect that mineral filler may have on aging.…”

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confidence: 99%

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Effect of Mineral Fillers on the Oxidative Aging of Asphalt Binders

Moraes

Bahia

2015

Transportation Research Record: Journal of the Transportation R

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Aging of asphalt binders is induced by chemical or physicochemical changes during production of pavement and throughout its service life. Although binder aging in pavement always occurs while binders are in contact with aggregates and mineral filler, in most laboratory aging studies and in current specifications, asphalt binders are individually aged without accounting for aggregate induced interactions. Past research has had conflicting findings, as it attributes mitigating or catalytic effects to the presence of mineral fillers in asphalt binders with oxidative aging. Thus, in the present study it was hypothesized that evaluation of asphalt oxidative aging without taking into account the interactive effect of the presence of mineral fillers was inadequate as a specification tool. The effect of mineral fillers on oxidative aging of asphalt was investigated with accelerated aging of mastics (asphalt and fillers) in a pressure aging vessel (PAV) and by measuring the changes in stiffness and glass transition temperature ( Tg). The testing matrix included an aging evaluation of mastics containing different fillers, mineralogy, and surface area. The results showed that the low-temperature behavior of aged mastic could be modified by controlling filler concentration and type. The fillers acted as an agent adsorbing heavy fractions of asphalt binder and therefore reduced stiffness and changing Tg. During oxidative aging of asphalt binders and mastics, diffusion and adsorption mechanisms played a role in the rate of aging of asphaltic material. The results provided insight on the potential for selecting a mineral filler concentration and mineralogy type to reduce the impact of oxidative aging and possibly improve the service life of pavement.

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“…The rate depends on the composition of the asphalt and the temperature. Oxidation is the major factor responsible for the irreversible hardening of asphalts (6,7,12).…”

Section: Background Aging Process In Asphalt Bindermentioning

confidence: 99%

mentioning

confidence: 99%

Effect of Mineral Fillers on the Oxidative Aging of Asphalt Binders

Moraes

Bahia

2015

Transportation Research Record: Journal of the Transportation R

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“…As shown in Figure 12, the I values of carboxylic acid, aldehyde, ketone, and sulfoxide functional groups increased after asphalt aging, indicating that the viscosity and hardness of asphalt increased, and the rutting resistance of asphalt mixture improved, but the fatigue performance of asphalt mixture was affected [49,50]. The aging effect makes the I values of amide, anhydride and ester of asphalt decreased, demonstrating that the cohesion between asphalt and aggregate decreased, which leads to the decrease of anti-stripping performance of asphalt mixture [51,52].…”

Section: Ftirmentioning

confidence: 99%

Preparation and Properties of Wood Tar-based Rejuvenated Asphalt

Zhang

Zhu

Wu³

et al. 2020

Materials

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In order to explore the applicability of the rejuvenated asphalt with wood tar as the main raw material, the orthogonal test was used to determine the optimal ratio of wood tar-based rejuvenator. The physical properties, rheological properties and components of matrix asphalt, aged asphalt, wood tar-based rejuvenated asphalt and commercial RA-102# rejuvenated asphalt were tested and compared. The results show that the optimal ratio of wood tar-based rejuvenator is 15wt% wood tar, 0.3wt% biomass fiber, 5wt% plasticizer, 0.3wt% compatibilizer, and 1wt% stabilizer of the mass of aged asphalt. Wood tar-based rejuvenator can restore the physical properties of the aged asphalt to meet the specification requirements. The synergistic effect of biomass fiber and plasticizer make the wood tar-based rejuvenated asphalt has good resistance to accumulated permanent deformation, but its low-temperature cracking resistance needs to be further improved. During the rejuvenation process of aged asphalt, the colloidal state changes from gel-state to sol-state, characterizing that the viscosity of asphalt decreased and the fluidity increased. Wood tar-based rejuvenator can react with aged asphalt to weaken the vibration strength of carbonyl and sulfoxide groups, so as to realize the recovery of service performance. Wood tar-based rejuvenator has better environmental protection and applicability, which is worthy of further study and promotion.

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“…The two heavy and polar components of heavy oil are asphaltenes and resin [17]. Asphaltenes are the highest molecular weight compounds with aromatic rings structure, some side chains and carbon/hydrogen ratio less than 0.8 [18]. Asphaltenes influence the viscosity of heavy oil greatly but resins reduce the influence of asphaltenes on viscosity [17].…”

Section: Effects On Asphaltenes Content Of the Bindersmentioning

confidence: 99%

Properties of Asphalt Binders with the Residue from Pyrolysis of Biomass as the Warm Mix Additive

Tew¹,

Tye²,

Hamzah³

et al. 2017

Int J Petrochem Res

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Asphalt is a complex mixture of hydrocarbons. Recently, a series of substances have been used as an additive in order to change the asphalt's properties especially in the road pavement engineering. This paper presents the properties changes of two asphalt binders: AC 80/100 and SBS modified binders as the results of using residue from pyrolysis of biomass as the warm mix additive. The resulted asphalt binders were evaluated over a series of analyses including viscosity tests, dynamics shear rheological tests, gel permeation chromatography and asphaltenes content analysis. Generally, it could be concluded that residue from pyrolysis of biomass has a potential to be a warm mix additive in term of viscosity reduction under certain conditions. It has also sufficient Superpave rutting resistance at temperature as high as 64 o C.

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Characterization of Asphalt Binders Based on Chemical and Physical Properties

Cited by 33 publications

References 2 publications

Effect of Mineral Fillers on the Oxidative Aging of Asphalt Binders

Effect of Mineral Fillers on the Oxidative Aging of Asphalt Binders

Preparation and Properties of Wood Tar-based Rejuvenated Asphalt

Properties of Asphalt Binders with the Residue from Pyrolysis of Biomass as the Warm Mix Additive

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