TLA/SBR复合改性沥青与混合料性能研究  

Study on performance of TLA/SBR composite modified asphalt and asphalt mixture

作　　者：任非 REN Fei(College of Applied Engineering,Henan University of Science and Technology,Sanmenxia 472000,China;Sanmenxia Polytechnic,Sanmenxia 472000,China)

机构地区：[1]河南科技大学应用工程学院,河南三门峡472000 [2]三门峡职业技术学院,河南三门峡472000

出　　处：《新型建筑材料》2021年第4期80-84,共5页New Building Materials

基　　金：河南省高等学校专业综合改革试点项目(豫教高〔2015〕33号)。

摘　　要：基于复合改性沥青针入度体系评价指标和接触角粘附性试验,评价TLA/SBR改性沥青的高低温性能、离析及施工和易性,通过室内路用性能和悬臂梁疲劳试验验证TLA/SBR改性沥青混合料的路用性能与抗疲劳性能。结果表明,掺加TLA可显著提升SBR改性沥青的软化点、黏度、表面能,改善复合改性沥青的粘附性,掺加SBR可改善改性沥青的低温延展性;掺加TLA可显著改善SBR改性沥青混合料的高温性能和水稳定性,SBR可弥补TLA改性沥青混合料的低温性缺陷,TLA/SBR复合改性沥青混合料具有优异的路用性能和抗疲劳性能。TLA的适宜掺量为20%~30%,SBR的适宜掺量为3.5%~4.5%。Based on the evaluation index test and contact angle adhesion test of the composite modified asphalt penetration system,the high-low temperature performance,segregation,construction and workability of TLA/SBR modified asphalt were evaluated,road performance and fatigue resistance of TLA/SBR modified asphalt mixture were verified by indoor road performance test and cantilever beam fatigue test.The results show that the addition of TLA can significantly improve the softening point,viscosity and surface energy of SBR modified asphalt,and improve the adhesion of composite modified asphalt.The addition of SBR ensures that TLA can have sufficient low temperature ductility.The addition of TLA significantly improves the high temperature performance and water stability of SBR modified asphalt mixture.SBR modifier makes up for the low temperature performance defects of TLA modified asphalt mixture.TLA/SBR composite modified asphalt mixture has excellent comprehensive road performance and fatigue resistance.The recommended TLA dosage is 20%~30%,and SBR dosage is 3.5%~4.5%.

关 键 词：特立尼达湖沥青 SBR 复合改性沥青 沥青混合料 性能 道路工程 

分 类 号：TU535[建筑科学—建筑技术科学]