Brittleness is an inherent shortcoming of epoxy resin which results in the longitudinal fatigue cracking of mixtures during the long service time of orthotropic steel deck bridges. In this paper, this problem was addressed by introducing a reactive thermoplastic elastomer, epoxidized styrene–butadiene–styrene copolymer (ESBS) into epoxy asphalt binder (EAB). Epoxy ESBS modified asphalts (EESBAs) with various epoxidation degrees were prepared. Double phase separation occurred in the EESBAs. In the EESBAs with 18% and 31% epoxidation degrees, most of ESBS domains dispersed on the edge of the secondary asphalt phase and in the epoxy phase. Furthermore, the size and number of ESBS domains decreased in the epoxidation degree. However, un-epoxidized SBS domains completely dispersed the asphalt phase and all ESBS domains moved to the epoxy phase when the epoxidation degree increased to 39%. In EESBAs, the average diameters of asphalt domains increased in the epoxidation degree. The inclusion of ESBS increased the viscosity of the pure EAB and the viscosity of EESBAs increased in the epoxidation degree. Nevertheless, all EESBAs had at least a 150-min allowable construction time. By adding 2 wt% ESBS with 39% epoxidation degree, the glass transition temperature (T_g) decreased. The T_g of EESBAs decreased in the epoxidation degree. The inclusion of ESBS greatly enhanced the damping properties of the pure EAB. The elongation at break and toughness of the pure EAB were remarkably increased by 263% and 93%, respectively, with the incorporation of 2 wt% ESBS with 39% epoxidation degree. Furthermore, the toughness of EESBAs increased in the epoxidation degree.

脆性是环氧树脂的固有缺点，在正交各向异性钢桥面桥长期使用过程中会导致混合物纵向疲劳开裂。在本文中，该问题通过将反应性热塑性弹性体、环氧化苯乙烯-丁二烯-苯乙烯共聚物 (ESBS) 引入环氧沥青粘合剂 (EAB) 来解决。制备了具有不同环氧化度的环氧 ESBS 改性沥青 (EESBA)。EESBA 中发生双相分离。在环氧化度为 18% 和 31% 的 EESBA 中，大部分 ESBS 域分散在次生沥青相的边缘和环氧树脂相中。此外，ESBS 结构域的大小和数量随着环氧化程度的增加而减少。然而，当环氧化度增加到 39% 时，未环氧化的 SBS 域完全分散了沥青相，并且所有 ESBS 域都转移到了环氧相中。在 EESBA 中，沥青域的平均直径随着环氧化度的增加而增加。ESBS 的加入增加了纯 EAB 的粘度，而 EESBAs 的粘度随着环氧化度的增加而增加。尽管如此，所有 EESBA 都有至少 150 分钟的允许施工时间。通过添加 2 wt% 的 ESBS，环氧化度为 39%，玻璃化转变温度 ( 所有 EESBA 都有至少 150 分钟的允许施工时间。通过添加 2 wt% 的 ESBS，环氧化度为 39%，玻璃化转变温度 ( 所有 EESBA 都有至少 150 分钟的允许施工时间。通过添加 2 wt% 的 ESBS，环氧化度为 39%，玻璃化转变温度 (T _g ) 降低。所述Ť_克EESBAs的环氧化程度降低。ESBS 的加入大大增强了纯 EAB 的阻尼性能。纯EAB的断裂伸长率和韧性分别显着提高了263%和93%，加入了2wt%的环氧化度为39%的ESBS。此外，EESBAs 的韧性随着环氧化度的增加而增加。