Influence of the chemical composition and the morphology of crumb rubbers on the rheological and self-healing properties of bitumen

Liu, Gang; Liang, Yangshi; Chen, Hao; Wang, Hao; Komačka, Jozef; Gu, Xin

doi:10.1016/j.conbuildmat.2019.03.205

Cited by 23 publications

(6 citation statements)

References 16 publications

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“…According to the time–temperature superposition principle, high frequency corresponds to low temperature, and low frequency is in line with high temperature for bitumen [ 38 ]. Based on the definition of complex shear modulus and phase angle, a higher value of complex shear modulus relates to an increase in bitumen stiffness, and a smaller value of phase angle indicates a better elastic response of bitumen [ 39 ]. As seen from Figure 8 and Figure 9 , it is obvious that phase angle decreased, and the complex shear modulus increased with the increase in frequency.…”

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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“…Several works have been done on waste crumb rubber modified asphalt (WRMA) [9][10][11][12][13][14]. It was proved that the addition of waste crumb rubber (WR) could improve the performance of asphalt, such as better rutting resistance [15][16][17], enhanced fatigue life [18,19], and moisture damage resistance [20].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Storage Stability and Rheological Properties of Asphalt Modified by Activated Waste Rubber Powder

Liu¹,

Wang³

et al. 2021

Materials

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Segregation of waste crumb rubber powder (WR) modified asphalt binders the large-scale application of WR in asphalt. The method of microwave activation combined with chemical activation (KMWR) was proposed to improve storage stability and rheological properties of WR modified asphalt in this work. Storage stability and rheological properties of virgin asphalt, MWR modified asphalt, and KMWR modified asphalt were comparatively studied by the standard segregation test, bending beam rheometer (BBR) test, and dynamic shear rheometer (DSR) test. The effect of composite activation on waste rubber powder particles was studied by Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM), and Brunauer–Emmett–Teller (BET) tests. The main results showed that after the physical and chemical composite activation, the storage stability of waste rubber powder modified asphalt was significantly improved, WR modified asphalt had better crack resistance, better rutting resistance, and better fatigue performance. After physical and chemical activation, WR was desulfurized, and a large number of active groups was grafted on the WR particles.

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“…This leads to a significant variation in the characteristics of the original asphalt cement. The rheological behavior of asphalt cements containing SBR and CR has been evaluated by several studies [26][27][28][29][30][31]. They found that the inclusion of SBR and CR increased the fatigue life of the base asphalt cements.…”

Section: Introductionmentioning

confidence: 99%

Temperature sensitivity and performance evaluation of asphalt cement incorporating different types of waste polymers

Enieb

Eltwati²,

Al-Jumaili

2021

Journal of Innovative Transportation

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Highlights• Temperature susceptibility of Asphalt cements modified with CR and rPET was investigated • The Temperature susceptibility was investigated by using PI, PVN, VTS, and AE methods • CR and rPET decreased the temperature susceptibility • CR and rPET increased the high temperature performance • Correlation between the methods used to evaluate the temperature sensitivity CR and rPET improved the rheological characteristics

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Influence of the chemical composition and the morphology of crumb rubbers on the rheological and self-healing properties of bitumen

Cited by 23 publications

References 16 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

Enhanced Storage Stability and Rheological Properties of Asphalt Modified by Activated Waste Rubber Powder

Temperature sensitivity and performance evaluation of asphalt cement incorporating different types of waste polymers

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