Preparation and performance of self-healing SBS modified bitumen based on dynamic disulfide bonds

Zhang, Tianwei; Gao, Shanjun; Yu, Jianying; He, Yanheng; Han, Xiao; Zhuang, Ronghua

doi:10.1016/j.conbuildmat.2023.132394

Cited by 10 publications

(1 citation statement)

References 40 publications

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“…Hence, developing a framework is necessary not only to match the abovementioned requirement, but also to accommodate the fatigue cracking behavior of any type of asphalt binder (NA or PMBs). Currently, the new procedure is being used to evaluate SPBs, which has been attracting the attention of researchers [28,29]. Our research team proposes that changing the foundational elements contained in the S-VECD model would make eliminating the ranking inconsistency possible.…”

Section: Introductionmentioning

confidence: 99%

Development of a Framework for Assessing Bitumen Fatigue Cracking Performance under Different Temperatures and Aging Conditions

Lv,

Ge,

Cao

et al. 2024

Buildings

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A full understanding of bitumen fatigue cracking behavior is extremely important as this phenomenon has a considerable influence on bituminous pavement performance. The current framework for assessing this asphalt binder property is inconsistent in ranking bitumen fatigue performance in terms of the failure definition and damage characteristic curve (DCC) analysis. This study used four different types of asphalt binders: neat asphalt (NA), self-healing thermoplastic polyurethane (STP)-modified bitumen, self-healing poly (dimethyl siloxane) crosslinked with urea bond (IPA1w)-modified bitumen, and styrene–butadiene–styrene (SBS)-modified bitumen (SBSB). All the bitumens were subjected to short-term and long-term aging, and they were also tested by utilizing the linear amplitude sweep (LAS) test and the simplified viscoelastic continuum damage (S-VECD) model. LAS and S-VECD procedures were used to apply the newly proposed and current frameworks in order to analyze bitumen performance. The current framework showed that the bitumens that used a higher number of loading cycles (N) to reach their failure points (Nf) failed to exhibit greater fatigue performances in terms of DCC analysis. The developed framework (mainly based on the damage intensity [S] instead of N) was used to solve the inconsistency between the failure definition and DCC assessment in ranking bitumen performance. Additionally, the current framework (failure criterion) presented two R2 values below 0.1, but the developed framework (failure criterion) showed that all R2 values were greater than 0.9. The developed framework represents a turning point because, for the first time, this type of procedure is mainly being based on S instead of N. Although further tests are needed to confirm its efficiency, it eliminates the inconsistency between the failure definition and DCC assessment.

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Section: Introductionmentioning

confidence: 99%

Development of a Framework for Assessing Bitumen Fatigue Cracking Performance under Different Temperatures and Aging Conditions

Lv,

Ge,

Cao

et al. 2024

Buildings

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Rheological properties and aging resistance of self‐healing polyurea elastomer modified asphalt

Li,

Zhang,

et al. 2024

Polymer Engineering & Sci

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Polymer modified asphalt containing dynamic chemical bonds has the potential to increase the service life of asphalt pavement due to its excellent self‐healing ability. The effect of this self‐healing accelerator with dynamic chemical bond on the rheological properties and aging resistance of asphalt binder is still unclear. In this study, a self‐healing polyurea elastomer (PUA) modified asphalt containing dynamic disulfide bonds was prepared. The high‐ and low‐temperature performance and fatigue resistance of PUA modified asphalt were studied through multiple stress creep, low‐temperature bending beam rheometer, mechanical glass transition temperature, and linear amplitude scanning tests. Moreover, considering the service environment of asphalt over a wide temperature range (−30–70°C), three rheological aging indices (RAI) were proposed. At the same time, the aging resistance of PUA modified asphalt was evaluated by chemical aging index (CAI) based on carbonyl and sulfoxide groups. Finally, a linear relationship is established between RAI and CAI over a wide temperature range. The experimental results show that self‐healing accelerators can increase the resistance to permanent deformation of asphalt by 47.41% and the fatigue resistance by 88.54%. The S value of PUA modified asphalt decreased by at most 33.21% and the m value increased by at most 35.23% compared with BA at −18°C. Moreover, PUA can improve the long‐term thermal oxygen aging resistance of asphalt binders by at least 38.33% over a wide temperature range.Highlights Rheological properties of self‐healing polyurea elastomer modified asphalt. Aging resistance of self‐healing polyurea elastomer modified asphalt. Proposed rheological aging indices for different temperature ranges. Clarified the correlation between chemical–rheological aging indices.

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Investigation of microstructure, rheological property and self-healing performance of SBS modified bitumen with dynamic disulfide bonds prepared by one-step method

Zhang,

Gao,

et al. 2024

Construction and Building Materials

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Preparation and performance of self-healing SBS modified bitumen based on dynamic disulfide bonds

Cited by 10 publications

References 40 publications

Development of a Framework for Assessing Bitumen Fatigue Cracking Performance under Different Temperatures and Aging Conditions

Development of a Framework for Assessing Bitumen Fatigue Cracking Performance under Different Temperatures and Aging Conditions

Rheological properties and aging resistance of self‐healing polyurea elastomer modified asphalt

Investigation of microstructure, rheological property and self-healing performance of SBS modified bitumen with dynamic disulfide bonds prepared by one-step method

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