納米TiO2/TLA復(fù)合改性瀝青及混合料性能研究
打開文本圖片集
LIU Hai
（Henan Jiaotou Zhengping Highway Co.，Ltd.， Zhengzhou 45OOOO，China）
Abstract： In order to study the effect of nano and TLA on the performance of SBS modified asphalt and its mixture，and determinetheoptimalcombinationscheme，theconventionalperformanceandhighandlowtemperaturerheologicalpropertiesof composite modifiedasphalt were studiedbyusing penetration，softening point，ductility，viscosity，shearheologyandbending rheology tests，andtheroad performanceofcompositemodifiedasphalt mixture was evaluatedandanalyzed.Theresults show that the incorporation of TLA or nano - will reduce the penetration and ductility of SBS modified asphalt，and increase the softeningpoint and viscosity．Among them，TLA has agreatinfluence，andthe contentof TLA should not be more than 25% ： Nano-TiOcanimprovethe high temperature shear deformationresistance of asphaltbinder，but atthe same timereduce the low temperature rheological properties of asphalt binder，and its content should not exceed 2% ．TLA andnano - TiO2 have significantefectsonimproving thehightemperaturerutingresistanceandwaterdamageresistanceofaspalt mixture，butatthe same time，TLA will significantly reduce its low temperature performance，and nano - TiO has little effect. Considering the comprehensive performance，the combination of 2% nano -TiO and 25% TLA is recommended as the optimal solution.
Keywords ： nano ；lake asphalt（TLA）；SBS modified asphalt；asphalt mixture；road performance
0 引言
目前，高等級(jí)道路大多采用瀝青路面，主要在于瀝青路面具有行車舒適度高、噪音小、通車時(shí)間快和維修簡單等優(yōu)點(diǎn)，但隨著道路上車流量不斷增長和重載超載車輛的增加，很多瀝青路面在經(jīng)歷第一個(gè)夏季和冬季后便出現(xiàn)了不同程度的車轍、裂縫等病害。（剩余4916字）