CAJ | 학술논문

将苯乙烯-丁二烯-苯乙烯三嵌段共聚物(SBS)、废旧轮胎胶粉(GTR)和相容剂环氧天然橡胶(ENR)熔融共混,然后再分散到沥青中制备了 SBS/ GTR 复合改性沥青,考察了 ENR 含量、SBS/ GTR (质量比)对复合改性沥青热储存稳定性和基本性能的影响。结果表明,随着 ENR 含量的增加或 SBS含量的减少,SBS/ GTR 复合改性沥青的热储存稳定性提高,当 ENR 质量分数为1．0%、SBS/ GTR 为50/50时,复合改性沥青的热储存稳定性最佳；随着 ENR 含量的增加,SBS/ GTR 复合改性沥青的软化点、针入度、延度和黏度变化不大,但当 ENR 质量分数为10．0%时,改性沥青的软化点明显升高,针入度下降,属于一种比较硬质的改性沥青,具有较好的施工和易性；随着 SBS 含量的减少,SBS/ GTR 复合改性沥青的软化点、黏度和延度均降低。
장분을희-정이희-분을희삼감단공취물(SBS)、폐구륜태효분(GTR)화상용제배양천연상효(ENR)용융공혼,연후재분산도력청중제비료 SBS/ GTR 복합개성력청,고찰료 ENR 함량、SBS/ GTR (질량비)대복합개성력청열저존은정성화기본성능적영향。결과표명,수착 ENR 함량적증가혹 SBS함량적감소,SBS/ GTR 복합개성력청적열저존은정성제고,당 ENR 질량분수위1．0%、SBS/ GTR 위50/50시,복합개성력청적열저존은정성최가；수착 ENR 함량적증가,SBS/ GTR 복합개성력청적연화점、침입도、연도화점도변화불대,단당 ENR 질량분수위10．0%시,개성력청적연화점명현승고,침입도하강,속우일충비교경질적개성력청,구유교호적시공화역성；수착 SBS 함량적감소,SBS/ GTR 복합개성력청적연화점、점도화연도균강저。
Storage-stable styrene-butadiene-styrene triblock copolymer (SBS) / ground tire rubber (GTR) hybrid modified asphalts were prepared by dispersing the melt blend of SBS, GTR and epoxidized natural rubber (ENR) into base asphalt. Effects of ENR content, SBS/ GTR(mass ratio) on storage sta-bility, phase structure and properties were studied. The results showed that the storage stability of the modified asphalt was improved with the increase of ENR content or decrease of SBS content, and the modified asphalt achieved the best storage stability when mass fraction of ENR was 1. 0% and SBS/ GTR was 50/ 50. ENR content had a slight influence on the soften-ing points, penetration, ductility and viscosity of hybrid bind-ers, however, when the mass fraction of ENR reached 10. 0% , softening points increased and penetration decreased obviously, and the modified asphalt was hard and easy to oper-ate. The softening points, viscosity and ductility of the modi-fied asphalt all decreased with the decrease of SBS content.