3d Porous Graphene Nanosheets as Efficient Additives for High-Performance Styrene-Butadiene-Styrene/Crumb Rubber Blend-Modified Asphalt

Wu, Zhiheng; Huang, Yi‐Lin; Gui, Lifa; Liang, Lizhe; Ying, Jingwei; Li, Weiqing; Shen, Pei Kang; Tian, Zhongxian

doi:10.2139/ssrn.4341116

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“…However, with the rapid development of society and the economy, conventionally modified asphalt binders with polymeric modifiers suffer more serious sever environment of increasing traffic volume and vehicle loads. These polymeric modifiers inevitably degrade after being exposed to oxygen, high temperature, and ultraviolet light for a long time, which makes them lack the durability necessary to meet the requirements of current pavement engineering [3][4][5][6][7][8][9]. Therefore, it is necessary to explore better modifiers to solve the inherent structural defects of polymeric modifiers.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Preparation and Performances of Epoxy-Modified Asphalt Binder and Its Mixtures

Liu,

Wu,

Min

et al. 2024

Materials

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Epoxy-modified asphalt binder has been widely used in steel deck pavement due to its excellent properties and it is a potential candidate for long life pavements. However, its short reserve time limits its widespread application in pavement engineering. Therefore, this work developed a novel epoxy-modified asphalt binder composed of a laboratory-made curing agent as a solution. Firstly, optimization of preparation temperature of this new material was studied to balance the requirements of enough construction time and the material strength and elongation. The epoxy-modified asphalt binder, prepared at the optimal temperature of 140 °C, had a reserve time exceeding 120 min, whereas the tensile strength and the elongation at failure were 2.22 MPa and 216%, respectively, which satisfied the standard requirements of paving epoxy material well. Secondly, the asphalt mixture property tests demonstrate excellent high-temperature rutting resistance, water stability and low-temperature anti-cracking ability. Additionally, the compatibility and colloidal stability of this epoxy-modified asphalt binder were analyzed in terms of microphase structure. The uniform microphase distribution of this binder showed by the laser confocal microscope observation in both short-term aging case and long-term aging case, indicates the great compatibility between asphalt and epoxy resin during paving process and service life. Furthermore, fatigue tests were conducted to evaluate the long-term durability. The fatigue life of epoxy-modified asphalt mixtures increased by 435%, 427%, 342%, and 276% under the stress ratios of 0.3, 0.4, 0.5, and 0.6, respectively, compared to those of SBS-modified asphalt mixtures. All these results indicate that the new epoxy-modified asphalt material is promising for applications in pavement engineering, especially suitable for long-life road pavement.

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Section: Introductionmentioning

confidence: 99%