Structure and performance evaluation on aged SBS modified bitumen with bi- or tri-epoxy reactive rejuvenating system

Xu, Xiong; Yu, Jianying; Li, Xue; Zhang, Canlin; He, Bin; Wu, Min

doi:10.1016/j.conbuildmat.2017.06.102

Cited by 30 publications

(10 citation statements)

References 26 publications

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“…In order to reduce the ageing, some researchers work in different studies to improve the aging resistance of SBS modified bitumens using antioxidants like Irganox 1010 and Irgafos 168, both extracted by acetone, to reduce the thermal oxidation [17]. On the other hand, Xu X. et al [18] used the synergistic effect of 4,4'-diphenylmethane diisocyanate and 1,4-butanodiol diglycidyl ether in rejuvenation of aged SBS. However, SEBS modified bitumens reduce the ageing effect on physical and rheological properties compared with SBS modified bitumen [19], but it had to be remembered that the properties of modified bitumen are largely influenced by the process of ageing.…”

Section: Introductionmentioning

confidence: 99%

Influence of Ultraviolet Radiation Exposure Time on Styrene-Ethylene-Butadiene-Styrene (SEBS) Copolymer

2020

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The effect of ultraviolet radiation on styrene-ethylene-butadiene-styrene (SEBS) has been studied at different exposures times in order to obtain a better understanding of the mechanism of ageing. The polymer materials were mechanically tested and then their surfaces were analyzed using a scanning electron microscope (SEM) and atomic force microscopy (AFM). Moreover, the optical analysis of contact angle (OCA) was used to evaluate the surface energy (γ s ) and the yellowing index (YI) and attenuated total reflectance infrared spectroscopy (ATR-FTIR) were used to observe structural and physical changes in aging SEBS. The results obtained for the SEBS, in relation to the duration of exposure, showed superficial changes that cause a decrease in the surface energy (γ s ) and, therefore, a decrease in surface roughness. This led to a reduction in mechanical performance, decreasing the tensile strength by about 50% for exposure times of around 200 hours.

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Section: Introductionmentioning

confidence: 99%

Influence of Ultraviolet Radiation Exposure Time on Styrene-Ethylene-Butadiene-Styrene (SEBS) Copolymer

2020

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“…The fatigue factor (G*·sin δ) is used to evaluate the fatigue resistance of SMB. The higher the G*·sin δ, the lower the fatigue resistance [ 30 , 31 ]. The frequency correlations of G*·sin δ at different temperatures (−10, 0, 10, and 20 °C) are demonstrated in Figure 7 .…”

Section: Resultsmentioning

confidence: 99%

SBS Modified Bitumen with Organic Layered Double Hydroxides: Compatibility and Aging Effects on Rheological Properties

et al. 2021

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SBS-modified bitumen (SMB) is susceptible to aging, which seriously influences its service performance and life. In order to strengthen the anti-aging ability of SMB, triethoxyvinylsilane was designed to organically modify layered double hydroxides (LDHs) and was applied to modify SMB. The dispersibility and storage stability of LDHs in SMB were markedly enhanced after triethoxyvinylsilane organic modification, and the compatibility and storage stability of SBS in bitumen were simultaneously enhanced. Compared with SMB, the introduction of LDHs and organic LDHs (OLDHs) could ameliorate the high-temperature properties of SMB, and the thermostability of SBS in bitumen at a high temperature was also distinctly improved, especially OLDHs. After aging, due to the oxidation of molecular bitumen and the degradation of molecular SBS, SMB became hardened and brittle, and the rheological properties were significantly deteriorated, which had serious impacts on the performance of SMB. LDHs can mitigate the detriment of aging to bitumen and SBS, and the deterioration of the rheological properties of SMB is obviously alleviated. As a result of the better dispersibility and storage stability, OLDHs exerted superior reinforcement of the anti-aging ability of SMB.

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“…As a matter of fact, remarkable attempts have been made since the '60s [17], but the bitumen complex organization has hindered the development of such structural study in details. The structural investigation has been, therefore, generally carried out by Atomic Force Microscopy (AFM) [18], by Confocal Laser Scanning Microscopy [19], by Optical Microscopy [20], and Fluorescence Microscopy [21], but all these methods were used to probe the micro-scale (not going deeper to the nano-scale) and the surface. Attempts at gaining information on the nano-scale structure of the bulk have been limited, and the results remained quite hypothetical [22].…”

Section: Methods For Bitumen Characterizationsmentioning

confidence: 99%

“…Figure21. AFM phase image of aged bitumen (a) and aged bitumen doped with 20% of BM1 (b) with (i) elliptical domains, (ii) matrix, (iii) tertiary phase and (iv) quaternary phase (adapted from Reference[63]).…”

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confidence: 99%

A Review on Bitumen Rejuvenation: Mechanisms, Materials, Methods and Perspectives

et al. 2019

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This review aims to explore the state of the knowledge and the state-of-the-art regarding bitumen rejuvenation. In particular, attention was paid to clear things up about the rejuvenator mechanism of action. Frequently, the terms rejuvenator and flux oil, or oil (i.e., softening agent) are used as if they were synonymous. According to our knowledge, these two terms refer to substances producing different modifications to the aged bitumen: they can decrease the viscosity (softening agents), or, in addition to this, restore the original microstructure (real rejuvenators). In order to deal with the argument in its entirety, the bitumen is investigated in terms of chemical structure and microstructural features. Proper investigating tools are, therefore, needed to distinguish the different mechanisms of action of the various types of bitumen, so attention is focused on recent research and the use of different investigation techniques to distinguish between various additives. Methods based on organic synthesis can also be used to prepare ad-hoc rejuvenating molecules with higher performances. The interplay of chemical interaction, structural changes and overall effect of the additive is then presented in terms of the modern concepts of complex systems, which furnishes valid arguments to suggest X-ray scattering and Nuclear Magnetic Resonance relaxometry experiments as vanguard and forefront tools to study bitumen. Far from being a standard review, this work represents a critical analysis of the state-of-the-art taking into account for the molecular basis at the origin of the observed behavior. Furnishing a novel viewpoint for the study of bitumen based on the concepts of the complex systems in physics, it constitutes a novel approach for the study of these systems.

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Structure and performance evaluation on aged SBS modified bitumen with bi- or tri-epoxy reactive rejuvenating system

Cited by 30 publications

References 26 publications

Influence of Ultraviolet Radiation Exposure Time on Styrene-Ethylene-Butadiene-Styrene (SEBS) Copolymer

Influence of Ultraviolet Radiation Exposure Time on Styrene-Ethylene-Butadiene-Styrene (SEBS) Copolymer

SBS Modified Bitumen with Organic Layered Double Hydroxides: Compatibility and Aging Effects on Rheological Properties

A Review on Bitumen Rejuvenation: Mechanisms, Materials, Methods and Perspectives

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