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高温铺装环氧沥青是一种性能优异的道路铺面材料,固化后强度较高且在高温下不易熔融流动。但是制备工艺对环氧沥青性能有显著影响,其中拌和温度对其各项性能的影响尤为显著。文中针对不同沥青作为基体的环氧沥青体系,分别研究了在150、170和190℃下拌和制备的环氧沥青的相态结构、力学性能和玻璃化转变过程。与150℃下拌和制得的环氧沥青固化物相比,170和190℃下制备的环氧沥青固化物的相容性明显改善,其力学性能也相对较高,其中170℃下制备的环氧沥青拉伸强度最高可达3.0 MPa,断裂伸长率为395%;此外190℃下制备的环氧沥青的玻璃化转变温度可降低至-13.7℃,在较低温度条件下能够保持良好的韧性,具备一定的变形能力。
High Temperature Paving Epoxy Asphalt is a high performance pavement material that provides high strength after curing and is not easily melt-flow at elevated temperatures. However, the preparation process has a significant impact on the performance of epoxy asphalt, in which the mixing temperature of its performance is particularly significant. In this paper, the phase structure, mechanical properties and glass transition of epoxy asphalt prepared by mixing at 150, 170 and 190 ℃ were studied respectively for epoxy asphalt with different bitumen as matrix. Compared with the epoxy asphalt cured by mixing at 150 ℃, the compatibility of cured epoxy asphalt at 170 ℃ and 190 ℃ is obviously improved, and the mechanical properties are also relatively high. The ring prepared at 170 ℃ The tensile strength of oxygen asphalt is up to 3.0 MPa and the elongation at break is 395%. In addition, the glass transition temperature of epoxy asphalt prepared at 190 ℃ can be reduced to -13.7 ℃ and can be maintained at lower temperature Toughness, with a certain degree of deformation capacity.