CAJ | 학술논문

针对包括内蒙古在内的西部地区常用的3种聚合物改性沥青（胶粉改性沥青、SBS 改性沥青及复合胶粉改性沥青），利用扫描电镜（SEM）对比观察了废胶粉和 SBS 改性剂、普通沥青及3种改性沥青的微观结构形貌，发现两种改性剂均具有网状结构，3种改性沥青中橡胶粉及 SBS 改性剂都与沥青融合性良好；利用针入度粘度指数 P VN和粘温指数 VTS对3种改性沥青的感温性进行了评价，发现胶粉改性沥青具有最小的温度敏感性；利用动态剪切流变试验，通过研究复数剪切模量 G*及相位角δ随温度及频率变化的规律并利用改进的车辙因子对3种改性沥青的高温性能进行评价，得出胶粉改性沥青具有最好的高温稳定性，其次为复合胶粉改性沥青，并且从改性沥青微观结构的角度出发解释了3种改性沥青温度敏感性与高温变形性能存在此种规律的原因。
침대포괄내몽고재내적서부지구상용적3충취합물개성력청（효분개성력청、SBS 개성력청급복합효분개성력청），이용소묘전경（SEM）대비관찰료폐효분화 SBS 개성제、보통력청급3충개성력청적미관결구형모，발현량충개성제균구유망상결구，3충개성력청중상효분급 SBS 개성제도여력청융합성량호；이용침입도점도지수 P VN화점온지수 VTS대3충개성력청적감온성진행료평개，발현효분개성력청구유최소적온도민감성；이용동태전절류변시험，통과연구복수전절모량 G*급상위각δ수온도급빈솔변화적규률병이용개진적차철인자대3충개성력청적고온성능진행평개，득출효분개성력청구유최호적고온은정성，기차위복합효분개성력청，병차종개성력청미관결구적각도출발해석료3충개성력청온도민감성여고온변형성능존재차충규률적원인。
Three polymer modified asphalts(crumb rubber modified asphalt、SBS modified asphalt and compound crumb rubber modified asphalt)widely used in Inner Mongolia and western china are studied.Scanning Electron Microscope(SEM)is used to observe crumb rubber and SBS modifier、ordina-ry asphalt and three modified asphalts microstructure.We can see,two modifiers have net structure and they mix together with asphalt well.Penetration viscosity index (PVN)and viscidity temperature index (VTS)are used to evaluate the temperature sensitivity of three modified asphalts.The results indicate that crumb rubber modified asphalt has lowest temperature sensitivity.Using the dynamic shear rheological tests,by studying the plural shear modulus G* and phase Angle of the delta change with temperature and frequency and improved rutting factor was used to evaluate the high temperature performance of three kinds of modified asphalt,experimental results show,crumb rubber modified asphalt has the best tempera-ture stability,followed by compound crumb rubber modified asphalt,and from the perspective of micro-structure of modified asphalt explains the temperature sensitivity of the three kinds of modified asphalt and reason for the high temperature deformation performance is of such a law.