A phase-field cohesive zone model for fracture simulation of asphalt mixture

Han, Dongdong; Liu, Guoqiang; Yang, Tao; Xie, Yichang

doi:10.1016/j.engfracmech.2023.109149

Cited by 14 publications

(2 citation statements)

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“…The above analysis indicates that the brittleness of asphalt material exacerbates the low-temperature damages in asphalt mixtures; moreover, the brittleness temperature of asphalt is the dividing point of different properties of asphalt binder [11][12][13] . Suppose that we can extend the brittleness temperature of the asphalt binder to the low-temperature zone by 5-10°C through corresponding technologies, or the brittleness temperature of the asphalt binder can be adjusted below − 30°C.…”

Section: Introductionmentioning

confidence: 96%

“…The probability of cracking and rutting in asphalt pavements during their service life in cold regions is signi cantly higher than that in other temperature regions. Although the application of modi ed asphalt has improved the low-temperature performance of asphalt mixtures to some extent, low-temperature diseases on road surfaces in cold regions are still common [1][2][3] .…”

Section: Introductionmentioning

confidence: 99%

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Research on Preparation Technology of Brittle-resistant Asphalt Mixture Based on Wet-Dry Combined Modification Processes

Song,

Zheng,

Wei

et al. 2024

Preprint

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This study aims to reduce the brittle point temperature of asphalt binders and improve the low-temperature mechanical properties of mixtures by developing a brittle-resistant asphalt mixture preparation technology for use in cold regions. The SBS wet-modified asphalt was combined with the melted star-shaped SBS modifier through a dry method. During mixing and transportation, the high-temperature effect helped form a secondary cross-linking effect with part of the original SBS-modified asphalt. The rest was evenly dispersed in the form of tough fillers, effectively avoiding the segregation and high viscosity issues caused by the conventional high-dosage wet-modified SBS asphalt. Tests were conducted on the brittle point temperature of asphalt binders, oil–aggregate interface adhesion grade, high- and low-temperature rheological properties of asphalt binders and the high- and low-temperature performances of the mixture to analyse the scientific nature of the developed preparation technology. Results show that compared with the conventional wet-modified SBS asphalt, the brittle-resistant SBS-modified asphalt prepared based on the wet–dry method has a reduced brittle point temperature by nearly 6.6°C, maintains an adhesion grade of 5 at the oil-aggregate interface. Moreover, the m value increases by approximately 1.3 times, the low-temperature bending strain of the mixture increases by approximately 70%, and the low-temperature bending strength is enhanced by approximately 60%. These results demonstrate that the proposed brittle-resistant SBS-modified asphalt preparation technology significantly improves the low-temperature performance of the mixture whilst ensuring mixing quality, which is crucial for enhancing the service performance of asphalt pavements in cold regions.

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Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%