In this study, asphalt mixtures were engineered with bio-renewable soybean oil-derived modifiers, and then used for pavement demonstration projects in the U.S. states of Iowa and Minnesota in the summer of 2019. The performance grade, elastic recovery (R), and non-recoverable creep compliance (J_nr) of the binders were evaluated. The modification of asphalt binder for the Iowa project almost maintained the high and low temperature grades, and the presence of modifier in the mixture of Minnesota project resulted in a slight decrease in the low temperature grade while maintaining the high temperature grade. The J_nr and R values proved the increase of elasticity and relaxation of the asphalt binder modified for the Iowa project. The J_nr calculated for the Minnesota project revealed a considerable increase in the relaxation of the asphalt binder. Disc-shaped compact tension, Hamburg wheel tracking, and push-pull were the mechanical performance tests performed on the mixtures. Based on the results obtained from these tests, the Iowa mixture, produced with modified asphalt binder, showed a significant improvement in resistance to low-temperature cracking, rutting, moisture damage, and fatigue cracking. The Minnesota mixture, modified in the plant, showed a significant improvement in the fatigue performance and a slight improvement in low-temperature cracking resistance.

在这项研究中，沥青混合料采用生物可再生大豆油衍生改性剂进行工程设计，然后于 2019 年夏季用于美国爱荷华州和明尼苏达州的路面示范项目。评估了粘合剂的不可恢复蠕变柔量 (J _nr )。爱荷华项目沥青胶结料的改性几乎保持了高低温等级，而明尼苏达项目混合料中改性剂的存在导致低温等级略有下降，同时保持高温等级。J _nr和 R 值证明了为爱荷华州项目改性的沥青结合料弹性和松弛的增加。歼_NR为明尼苏达州项目计算的结果显示，沥青结合料的松弛显着增加。盘形压实张力、汉堡轮循迹和推拉是对混合物进行的机械性能测试。根据从这些测试中获得的结果，使用改性沥青粘合剂生产的爱荷华州混合料在抗低温开裂、车辙、湿损和疲劳开裂方面表现出显着改善。工厂改造后的明尼苏达混合气，疲劳性能显着改善，低温抗裂性略有改善。