Development and evaluation of roadway-oriented epoxy-modified asphalt binders and mixtures

Li, Kuan; Xie, Jianguang; Liu, Yanping; Tan, Yangwei; Pan, Youqiang

doi:10.1016/j.conbuildmat.2024.135398

Cited by 3 publications

(1 citation statement)

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“…Epoxy-modified asphalt binder is a thermosetting pavement material currently used primarily in bridge deck pavement due to its excellent resistance to rutting, deformation, and fatigue [ 10 , 11 , 12 , 13 , 14 , 15 ]. In 1967, the Adhesive Engineering Company in USA was proactively authorized by Shell Oil to use thermosetting epoxy-modified asphalt binder for the first time in the U.S. for the San Mateo–Hayward Bridge steel bridge deck paving [ 10 ].…”

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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