Aging Mechanism and Properties of SBS Modified Bitumen under Complex Environmental Conditions

Wei, Hui; Bai, Xianping; Qian, Guoping; Wang, Fei‐Yue; Li, Zhengfu; Jin, Jiao; Zhang, Yuhao

doi:10.3390/ma12071189

Cited by 63 publications

(23 citation statements)

References 30 publications

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“…By means of Dynamic Shear Rheometer (DSR), FTIR, the Indirect Tension Strength (GPC), nuclear magnetic resonance hydrogen spectroscopy (1H-NMR), and other experiments, Ran [13] explored the changes of the macroscopic properties and microstructure of base asphalt binders and SBS-modified asphalt binders under the coupling of heat, light, and water, and, based on the physical and rheological properties, the nonlinear coupled aging rate prediction differential equation and the aromaticity microstructure aging kinetic equation were established. Wei et al [14] evaluated the aging behavior of SBS-modified asphalt binders under various UV and water conditions, and found that water aggravates the UV aging of asphalt binder material, and the presence of acid or salt worsens UV aging. Zeng et al [15] found that UV radiation can only transmit within 4.5 μm of the surface layer, but the UV aging depth can reach deeper and increases with the UV radiation time.…”

Section: Introductionmentioning

confidence: 99%

Impact of Ultraviolet Radiation on the Aging Properties of SBS-Modified Asphalt Binders

et al. 2019

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Styrene Butadiene Styrene (SBS) polymer-modified asphalt binders have become widely used in asphalt pavement because of their advantages in high- and low-temperature performance and fatigue resistance. Asphalt pavement is inevitably exposed to sunlight and ultraviolet (UV) radiation during its construction and service life. However, consideration of the aging effect of UV radiation is still limited in current pavement design and evaluation systems. In order to evaluate the impact of UV radiation on the aging properties of SBS-modified asphalt binders, UV aging tests were performed on Rolling Thin Film Oven Test (RTFOT)-aged samples with different UV radiation intensities and aging times. Sixteen different groups of tests were conducted to compare the rheological properties and functional group characteristics of SBS-modified asphalt binders. Dynamic Shear Rheometer (DSR), Bending Beam Rheometer (BBR), FTIR, and SEM tests were conducted to evaluate the aging mechanisms in various UV aging conditions. The results found that UV radiation seriously destroys the network structure formed by the cross-linking effect in SBS-modified asphalt binders, which aggravates the degradation of SBS and results in a great change of rheological properties after UV aging. The nature of SBS-modified asphalt binder aging resulted from the degradation of SBS and the changes of asphalt binder base composition, which lead to the transformation of colloidal structure and the deterioration of asphalt binder performance. The tests also found that continuous UV radiation can increase shrinkage stress in the asphalt binder surface and leads to surface cracking of the asphalt binder.

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Section: Introductionmentioning

confidence: 99%

Impact of Ultraviolet Radiation on the Aging Properties of SBS-Modified Asphalt Binders

et al. 2019

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“…In order to simulate different environmental conditions, water, acid and salt solution were prepared according to the method of references [ 34 , 35 ]. Water was prepared by using a distillation test.…”

Section: Materials and Experimental Methodsmentioning

confidence: 99%

“…Based on the reference to the relevant literature, 7 days were chosen as the aging time to carry out the UV irradiation process. At the same time, to simulate the adverse environmental conditions of asphalt pavement, water was used to accelerate the UV aging, the environmental chamber was opened every 12 h, and 1 g of water/acid/salt was sprayed on the asphalt surface of each corresponding specimen [ 34 ]. Therefore, the aging procedure before each test was to conduct TFOT before UV aging of asphalt.…”

Section: Materials and Experimental Methodsmentioning

confidence: 99%

Influence of Different Aging Environments on Rheological Behavior and Structural Properties of Rubber Asphalt

2020

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Research on asphalt aging properties mainly focuses on temperature and ultraviolet (UV) radiation, while water, acid and salt media in natural environment are often ignored. According to the aging simulation of self-made UV environment chamber, the influence of the coupling effect of different media and UV radiation on rubber asphalt properties was analyzed through physical properties, rheological properties and micro characteristics, and the structural properties of asphalt were revealed. The results indicated that different media can accelerate the aging of rubber asphalt. The penetration, creep rate and non-recoverable creep compliance of asphalt decreased, while the softening point, rutting factor, recoverable rate, fatigue factor and stiffness modulus increased. The coupling effect between acid and UV radiation had the most impact on asphalt rutting and fatigue cracking. The rubber asphalt performed better at high-temperature after aging, and it was more prone to fatigue damage and performed worse at low-temperature. Through the oxygen absorption reaction causing asphalt aging, the intensity of the absorption peaks of the carbonyl and sulfoxide groups increased and the light components of the asphalt transitioned to heavy components under UV radiation. These media intensified this process, which resulted in the gradual transformation of the asphalt colloid structure into a gel type. The carbon black contained in the waste rubber powder made the rubber asphalt exhibit better anti-aging properties.

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“…The high temperature rheological properties of the modified bitumen were tested with an MCR 301 intelligent dynamic shear rheometer (DSR) produced by Anton Paar (Graz, Austria). The test method is referred to AASHTO T 315-2012 [20,21]. Two parallel circular plates with a diameter of 25 mm and a spacing of 1 mm were used.…”

Section: Methodsmentioning

confidence: 99%

A Study on Modified Bitumen with Metal Doped Nano-TiO2 Pillared Montmorillonite

et al. 2019

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TiO2 pillared montmorillonite (T/M) modifiers have been studied to alleviate the aging of asphalt pavement and degrade automobile exhaust, but the photocatalytic activity of ordinary TiO2 is not good enough. In this study, in order to improve the photocatalytic performance of T/M, different metal (Ce, Cu, Fe) doped modifiers were prepared based on T/M. Metal doped TiO2 pillared montmorillonite was prepared by the sol-gel method. The modifier was characterized by X-ray diffraction (XRD) and an Ultraviolet visible (UV-Vis) spectrophotometer. The results show that TiO2 with different metal ions successfully entered into the layer of organic montmorillonite (OMMT) to form a pillared structure. Compared with the undoped TiO2 pillared montmorillonite (T/M), the optical absorption edge of the metal doped TiO2 pillared montmorillonite has an obvious red shift. In addition, the influences of the different content of modifiers on the properties of the original bitumen and catalytic capacities for automobile exhaust were also investigated. The results show that Ce doped TiO2 (Ce-T/M) pillared montmorillonite has the best improvement in high temperature performance and ultraviolet (UV) resistance of bitumen. In the experiment of automobile exhaust degradation, the degradation law of NO and HC showed Cu-T/M > Ce-T/M > Fe-T/M > T/M. These three kinds of metal ions can effectively improve the photocatalytic degradation efficiency of T/M.

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Aging Mechanism and Properties of SBS Modified Bitumen under Complex Environmental Conditions

Cited by 63 publications

References 30 publications

Impact of Ultraviolet Radiation on the Aging Properties of SBS-Modified Asphalt Binders

Impact of Ultraviolet Radiation on the Aging Properties of SBS-Modified Asphalt Binders

Influence of Different Aging Environments on Rheological Behavior and Structural Properties of Rubber Asphalt

A Study on Modified Bitumen with Metal Doped Nano-TiO2 Pillared Montmorillonite

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