HVM-TSR高黏改性剂的制备及应用性能  

Preparation and application properties of high-viscosity modifier HVM-TSR

作　　者：陈俐企 张增平[1] 黄婷 班孝义 刘浩 CHEN Liqi;ZHANG Zengping;HUANG Ting;BAN Xiaoyi;LIU Hao(Key Laboratory for Special Area Highway Engineering of Ministry of Education,Chang’an University,Xi’an 710064,China)

机构地区：[1]长安大学教育部特殊地区公路工程重点实验室,西安710064

出　　处：《中国科技论文》2022年第12期1408-1414,共7页China Sciencepaper

摘　　要：为制备出性能优良且价格低廉的高黏改性剂,以降低高黏沥青使用成本,运用熔融共混工艺,将苯乙烯-丁二烯-苯乙烯嵌段共聚物(styrene-butadiene-styrene block copolymer,SBS)、萜烯-苯乙烯树脂(terpene-styrene resin,TSR)及少量增塑剂混炼制备出HVM-TSR高黏改性剂,研究其对基质沥青的改性效果,并选用传统高黏改性剂(TPS)作为对照组。通过常规物理性能试验确定HVM-TSR、TPS高黏改性剂各自的最佳掺量,结合离析试验、荧光显微镜、傅里叶变换红外光谱、动态剪切流变试验和弯曲梁流变试验,对HVM-TSR、TPS高黏沥青的热储存稳定性、微观结构、改性机理、高低温流变性能进行对比研究。结果表明:HVM-TSR、TPS高黏改性剂最佳掺量分别为14.5%~18.2%、15.2%~17.5%,最佳掺量范围内的HVM-TSR高黏改性剂颗粒均匀分散于沥青中形成致密连续的网状结构。HVM-TSR、TPS高黏沥青制备过程中均无新的官能团生成,高黏改性剂与沥青仅为物理共混。0~48 h热储存过程中,2种高黏沥青的软化点差均小于2.5℃,满足热储存稳定性要求。相比于TPS高黏改性剂,HVM-TSR改性制备的高黏沥青具有更好的高温抗车辙性能和低温柔韧性,且成本仅为TPS高黏改性剂的48%,大幅降低了高黏沥青的使用成本。In order to prepare high-viscosity modifier with excellent performance and low price,reducing the use cost of high-viscosity asphalt,the high-viscosity modifier HVM-TSR was prepared by blending styrene-butadiene-styrene block copolymer(SBS),terpene-styrene resin(TSR)and a small amount of plasticizer using melting blending process.Its modification effect on base asphalt was studied.The traditional high-viscosity modifier(TPS)was set as the control group.The conventional physical property tests were conducted to determine the optimum amount of HVM-TSR and TPS high-viscosity modifiers.Combined with separation tests,fluorescence microscopy,Fourier transform infrared spectroscopy,dynamic shear rheology tests and bending beam rheology tests,the thermal storage stability,microstructure,modification mechanism,and high and low-temperature rheological properties of HVM-TSR and TPS high-viscosity asphalt were comparatively studied.The results show that the optimal dosage of HVM-TSR and TPS high-viscosity modifiers are 14.5%-18.2%and 15.2%-17.5%,respectively.The HVM-TSR high-viscosity modifiers in the optimal dosage range are evenly distributed in the asphalt to form a dense and continuous network structure.There is not any new functional group formed during the preparation of HVM-TSR and TPS high-viscosity asphalt.The high-viscosity modifier and asphalt are only physically blended.During 0-48 h thermal storage,the difference of softening point between the two kinds of high-viscosity asphalt is less than 2.5℃,which meets the requirements of thermal storage stability.Compared with TPS high-viscosity modifier,the asphalt prepared by HVM-TSR has better high-temperature rutting resistance and low-temperature flexibility,and the cost is only 48%of TPS high-viscosity modifier,which greatly reduces the cost of high-viscosity asphalt.

关 键 词：道路工程 高黏改性剂 微观构造 改性机理 流变性能 

分 类 号：U414[交通运输工程—道路与铁道工程]