Aging of asphalt binders from weathered asphalt mixtures compared with a SHRP process

Yu, Jianying; Zhang, Dai; Shen, Junan; Zhu, Hong; Shi, Peng

doi:10.1016/j.conbuildmat.2017.11.060

Cited by 40 publications

(9 citation statements)

References 24 publications

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“…The corresponding decreasing percentage of the short-term aged and long-term aged LFSMA-13 As is shown in Figure 6, the maximum bending tensile strain decreases when the aging degree increases. In the aging process, the light component of the asphalt binder volatilizes, resulting in the hardening and brittleness of the asphalt binder and the decrease of deformation resistance of the asphalt material [39]. It can be also observed from Figure 6 is that the maximum bending tensile strain of BFSMA-13 is greater than that of the LFSMA-13.…”

Section: Cracking Resistance At Low Temperaturementioning

confidence: 90%

Evaluation of the Long-Term Performances of SMA-13 Containing Different Fibers

Chen

et al. 2021

Applied Sciences

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To clarify the influence of fiber type on the long-term performance of stone mastic asphalt (SMA), this paper used basalt fiber (BF) and lignin fiber (LF) to modify SMA-13 (SMA with aggregate nominal maximum particle size of 13.2 mm) asphalt mixture. The pavement performances (high-temperature performance, cracking resistance at low and medium temperature, and water stability) of the two kinds of fiber-reinforced SMA-13 were checked under different aging degrees (unaged, short-term aged and long-term aged), scanning electron microscope (SEM) test was conducted to explain the strengthening mechanism of the fibers. Fourier transform infrared spectrometry (FTIR) was used to analyze the changes in the chemical composition of asphalt after aging. The results of the wheel tracking test and uniaxial penetration test showed that the high-temperature performance of the BFSMA-13 (defined as the SMA-13 containing BF) is better than that of the LFSMA-13 (defined as the SMA-13 containing LF) at different aging degrees. The high-temperature performance of BFSMA-13 increases with the increase of the aging degree, while the aging process decreases the high-temperature property of LFSMA-13. The results of the three-point bending test and semi-circular bending (SCB) proved that BFSMA-13 is more capable of deformation and less prone to cracking at low and medium temperatures. The results of the immersion Marshal test indicated that BF can better improve the strength and the water stability of the SMA-13 mixture than LF. The SEM images showed that basalt fibers form a solid three-dimensional network structure in the mixture which could contribute to the strengthening of the mixture. The results of infrared spectroscopy analysis showed that styrene–butadiene–styrene (SBS) degrades during asphalt mixture aging, and that the chemical composition of asphalt changes more after aging in LFSMA-13 than in BFSMA-13. The conclusions of this study help toward further understanding of the performance changes of the SMA-13 mixture during its service life and to guide the selection of fiber additives for SMA-13 mixtures.

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Section: Cracking Resistance At Low Temperaturementioning

confidence: 90%

Evaluation of the Long-Term Performances of SMA-13 Containing Different Fibers

Chen

et al. 2021

Applied Sciences

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“…As a rule, the content of silicon oxides in the composition of the rock is taken into account, which determines the adhesion of bitumen to the surface of stone materials. [14][15][16][17] There are practically no studies on the effect of other chemical elements on the physicalmechanical, technological and operational properties of asphalt concrete. The relevance of such studies is due to the need to use local rocks for road construction, which have generally similar physicochemical properties, but differ in the presence of one or two chemical compounds characteristic of a given area.…”

Section: Introductionmentioning

confidence: 99%

Change in Properties of Bitumen Used for Road Construction in Bitumineral Mixtures

Пугин

2022

Materials Research Proceedings

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Abstract. Premature destruction of asphalt concrete can be caused by the aging of bitumen, which is associated with a change in the physical and chemical properties of bitumen. The article shows that in most cases, the improvement of the characteristics of asphalt concrete is achieved through the introduction of additives that affect the basic properties of the bituminous binder, such as penetration, softening temperature, viscosity. The influence of the chemical composition of the mineral filler on the rate of bitumen aging has been experimentally proved. The obtained research data show that the increase in the rate of aging of bitumen is influenced by the compounds of silicon and aluminum. On the other hand, metals such as iron and titanium contribute to the preservation of the initial plasticity of bitumen, and the accumulation of asphaltenes in the structure of the bitumen-mineral mixture slows down.

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“…AFM has the potential to measure adhesion differences among micron-sized domains in asphalt binders [17]. Yu et al evaluated the adhesive property of aging asphalt binders quantitatively by using the AFM method [18]. Research shows that asphalt pavement performance is related to the cohesive and adhesive bonding within the asphalt-aggregate system, and the cohesive-adhesive bonding is related to the surface free energy characteristics of the system [19].…”

Section: Introductionmentioning

confidence: 99%

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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Aging of asphalt binders from weathered asphalt mixtures compared with a SHRP process

Cited by 40 publications

References 24 publications

Evaluation of the Long-Term Performances of SMA-13 Containing Different Fibers

Evaluation of the Long-Term Performances of SMA-13 Containing Different Fibers

Change in Properties of Bitumen Used for Road Construction in Bitumineral Mixtures

Evaluation of the Physical and Adhesive Properties of Natural Weathering Asphalt

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