Laboratory Evaluation of Biobased Epoxy Asphalt Binder for Asphalt Pavement

Application of Epoxy‐Asphalt Composite in Asphalt Paving Industry: A Review with Emphasis on Physicochemical Properties and Pavement Performances

“…It should be noted that asphalt content was also reported to have negligible effect on the curing reaction in the initial stage [15]. However, as the curing reaction progresses, the viscosity of EA decreases with increasing asphalt content [7,15,32,56,79,81,113], which indicates that asphalt binder can delay the curing reaction of EA in the later stage by diluting ER and curing agents [56]. On the other hand, viscosity of EA was reported to decrease with increasing penetration grade in the initial curing stage and it was lower than that of pure ER [129].…”

“…A bio-based anhydride curing agent was prepared by the addition of maleic anhydride (MAH) and methyl ester of eleostearic acid from tung oil fatty acid [31]. MAH alone was used as the curing agent to cure soybean oil based ER [32], where hydroxyl groups react with anhydride molecules. Compound curing agents, prepared by sebacic acid with methyl-tetrahydrophthalic anhydride (MeTHPA) or sebacic acid with tung oil anhydride (TOA) to create a bimodal microstructure to ensure the low-temperature cracking resistance and rutting resistance [33].…”

“…Besides conventional EA, EA was also successfully prepared with tung oil maleic tribasic acid as the curing agent [30], partially depolymerized lignin (PDL) as ER and tung oil fatty acid-derived curing agent [31], epoxidized soybean oil (ESO) as ER and MAH as the curing agent [32], and waste cooking oil-based epoxy resin (WCO-EP) and Advances in Materials Science and Engineering kraft lignin-based polycarboxylic acid (KL-COOH) as curing agents [65]. When nadic methyl anhydride (NMA) was added as the cocuring agent for processability adjustment, WCO-EP cured with low KL-COOH/NMA molar ratio (0 : 1 and 1 : 1) exhibited one glass transition and good thermal stability than that with high KL-COOH/NMA ratio (2 : 1 and 5 : 1) [65], indicating the homogeneous phase structure at low molar ratio and inhomogeneous crosslinked network at high molar ratio.…”

“…is indicates that the degree of curing reaction, mixing time, and mixing temperature should be carefully controlled to ensure the operation time. Due to the higher curing rate at higher temperatures, EA showed higher viscosity at higher curing temperature [32,124]. It has been generally agreed that the optimum viscosity of EA has to be between 2 Pa•s and 3 Pa•s when it comes to the pavement compaction [20,36,79,122].…”

Development and Laboratory Evaluation of a Cold Mix High-Early-Strength Epoxy Asphalt Concrete for Steel Bridge Deck Pavements

“…Zhang et al developed a cold-mix high-toughness epoxy resin through introducing a flexible chain into the molecular structure of cured epoxy resin [ 16 ]. Fuhaid et al used epoxidized soybean oil and a biobased curing agent, maleic anhydride, to develop a biobased epoxy asphalt binder for asphalt pavements [ 17 ].…”