Correlation of asphalt performance indicators and aging Degrees: A review

Wang, Feng; Xiao, Yue; Cui, Peide; Lin, Juntao; Li, Mingliang; Chen, Zongwu

doi:10.1016/j.conbuildmat.2020.118824

Cited by 102 publications

(31 citation statements)

References 61 publications

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“…The above test results showed that salt solution would also lead to bitumen aging. In order to systematically compare thermal-oxidative aging and salt solution aging, the aging degree of bitumen caused by different aging methods was characterized by the aging factor of the main property parameters [ 42 ]. In this research, the aging factor (AF) of oxygen content, penetration, softening point, and complex viscosity; the average value of AF of flexural creep stiffness and stress relaxation ability (at −12 and −18 °C); complex shear modulus |G*|; phase angle δ; and rutting factor (at 30, 40, 50, 60, 70, and 80 °C) were calculated according to Formula 1 and shown in Table 7 .…”

Section: Resultsmentioning

confidence: 99%

Comparative Study of Thermal-Oxidative Aging and Salt Solution Aging on Bitumen Performance

Zhang

Hoff

2021

Materials

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The aging of bitumen is detrimental to the durability and service life of asphalt pavement. Previous studies found that bitumen was suspected to be aged by not only thermal oxidation but also solution immersion. This research aims to compare the effect of thermal-oxidative aging and salt solution aging on bitumen performance. For this purpose, a thin film oven test (TFOT) and pressure aging vessel aging (PAV) were selected as thermal-oxidative aging, and 10% NaCl aging and 10% CaCl2 aging were selected as salt solution aging. The morphology, oxygen content, physical properties, low-temperature properties, and high-temperature properties of bitumen were analysed by employing scanning electron microscopy with an energy dispersive spectrometer (SEM-EDS), physical tests, a bending beam rheometer (BBR), and a dynamic shear rheometer (DSR). Test results show that both thermal-oxidative aging and salt solution aging had similar influencing trends in the oxygen content, physical, low-temperature, and high-temperature properties of bitumen but had different changes in morphology. The aging degrees caused by four kinds of aging methods were obtained based on the summed values of the absolute aging factor of all parameters: PAV > 10% NaCl > TFOT > 10% CaCl2. The conclusions could provide a theoretical basis to establish a standard for the solution aging of bitumen.

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Section: Resultsmentioning

confidence: 99%

Comparative Study of Thermal-Oxidative Aging and Salt Solution Aging on Bitumen Performance

Zhang

Hoff

2021

Materials

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“…These indices are based on binder complex modulus (G*), phase angle (δ), ZSV, and MSCR J nr before and after being subjected to aging. Rheological aging indices defined as the ratio of a parameter before and after aging have been used in several asphalt aging studies [ 29 , 30 ]. The rheological indices are defined such that a lower value of each aging index represents more minor changes due to aging in the rheological property under consideration and, therefore, a lower aging susceptibility.…”

Section: Materials and Methodologymentioning

confidence: 99%

Aging characteristics of asphalt binders modified with waste tire and plastic pyrolytic chars

2021

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Globally, the growing volume of waste tires and plastics has posed significant concerns about their sustainable and economical disposal. Pyrolysis provides a way for effective treatment and management of these wastes, enabling recovery of energy and produces solid pyrolytic char as a by-product. The use of pyrolytic chars in asphalt binder modification has recently gained significant interest among researchers. As asphalt binder aging influences the cracking, rutting, and moisture damage performance of asphalt binder and the mixtures, evaluation of aging characteristics of char modified asphalt binders is quite important. The main objective of this study is the investigation of the aging characteristics of asphalt binders modified with waste tire pyrolytic char (TPC) and waste plastic pyrolytic char (PPC) through rheological and spectroscopic evaluations. To imitate short-term and long-term aging conditions, the asphalt binders were first treated in a rolling thin film oven (RTFO) and then in a pressure aging vessel (PAV). The aging characteristics were determined using four rheological aging indices based on complex modulus (G*), phase angle (δ), zero shear viscosity (ZSV), and non-recoverable creep compliance (Jnr) from multiple stress creep and recovery (MSCR) test. The fatigue cracking potential was then measured through binder yield energy test (BYET). These parameters were measured through a dynamic shear rheometer. Fourier transform infrared (FTIR) and proton nuclear magnetic resonance (1H-NMR) spectroscopy analyses were then used to investigate changes in chemical composition due to aging in the char modified binders. Both TPC and PPC improved the high-temperature deformation resistance properties of asphalt binder. The TPC-modified binder showed better aging resistance than the control and PPC-modified binders, based on the different rheological and spectroscopic indices. The pyrolytic char modified binders also demonstrated good fatigue performance.

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“…Viscosity was obtained by using a Brookfield viscometer. Approximately 8.5 g of sample was placed into a Brookfield viscometer test tube and tested with a spindle rotating at 20 rpm, for neat asphalt and SBSMA (ASTM D4402) [7]. e torque was controlled at 50% in the viscosity test for AR, and the stretching speed in the ductility test for AR asphalt was 1 cm/min, in accordance with the provisions of the "Guidelines for Design and Construction of Asphalt Rubber and Mixture in Beijing" (2006).…”

Section: Basic Performance Testmentioning

confidence: 99%

“…Most of this research is carried out in laboratories. Aging methods include the thin-film oven test (TFOT), the rolling TFOT, and the pressurized aging vessel [7]. ese standard laboratory-aging methods are the shortterm and long-term aging simulations of asphalt [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

“…Asphalt-aging research aims mainly to establish performance indicators to quantify the aging-degree of asphalt in order to improve predictions of the properties of asphalt. At present, the traditional evaluation indexes of asphaltaging performance include basic physical properties (e.g., penetration, softening point, and ductility) and rheological indicators (e.g., viscosity, complex modulus (G * ), and phase angle (δ)) [7]. Many modern test methods, such as the atom force microscope (AFM), have been applied.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of the Physical and Adhesive Properties of Natural Weathering Asphalt

Wang

Zhou

et al. 2021

Advances in Materials Science and Engineering

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Asphalt suffers from a series of aging processes in the natural environment. This is a significant factor in asphalt pavement diseases. Research of the properties of the decay processes in the natural weathering of asphalt will be helpful in distinguishing the characteristics of the various types of asphalt and in the selection of pavement materials. Neat asphalt A70, a styrene-butadiene-styrene- (SBS-) modified asphalt, and crumb-rubber-modified asphalt AR are exposed to outdoor conditions to weather naturally. This process is traced by testing the basic physical properties and the surface free energy of asphalts, using the sessile drop method. Results illustrate that the basic physical properties of asphalt change significantly during the natural weathering process and that the rubber asphalt has the superior aging resistance, while the neat asphalt A70 has a high aging susceptibility. Furthermore, the presence of the SBS and rubber-powder modifiers transforms the change trend of the surface free energy of neat asphalt. The adhesion work between aggregate and asphalt can be used to quantitatively evaluate the adhesive properties between them. Meanwhile, the presence of moisture between the asphalt and aggregate changes cohesive failure into adhesive failure.

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Correlation of asphalt performance indicators and aging Degrees: A review

Cited by 102 publications

References 61 publications

Comparative Study of Thermal-Oxidative Aging and Salt Solution Aging on Bitumen Performance

Comparative Study of Thermal-Oxidative Aging and Salt Solution Aging on Bitumen Performance

Aging characteristics of asphalt binders modified with waste tire and plastic pyrolytic chars

Evaluation of the Physical and Adhesive Properties of Natural Weathering Asphalt

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