高粘改性剂在排水沥青混合料中的应用研究道路与铁道工程专业论文.docxVIP

高粘改性剂在排水沥青混合料中的应用研究Study 高粘改性剂在排水沥青混合料中的应用研究 Study on the application of high viscosity modifier in porous asphalt mixture Abstract With the continuous development of highway construction in China,people have paid more attention on the security and comfortability gradually than convenience in nowadays traffic environment．What is necessary for the highway construction department is to provide a safe，comfortable and environment—friendly traffic surroundings．With the feature of water draining and noise reduction，porous asphalt pavement meet the demand perfectly． The surface material of porous asphalt pavement is open-graded asphalt IIlixnlre，with large void ratio which reaches up to 20％．Rain falling into the surface of the porous asphalt pavement．will be drained out of the pavement咖c1[ure along the inner channel in the asphalt mixture．However，the open-graded porous asphalt mixture depends on modified asphalt binder with high viscosity to ensure its performance．In that case，the properties of high viscosity modified asphalt and its application in porous asphalt mixture are studied by means of experiments． In the paper，we first select 3 kinds ofmatrix asphalt and 2 kinds ofhigh viscosity modifier． Comparing the properties of modified asphalts under the salne content of modifier，we determined the matrix asphalt which has the best compatibility with the modifier．Using the selected matrix asphalt，we carry on the property study under the different content of high viscosity modifier，according to the results of performance test and economic factors，we make the final determination of the appropriate modifier and its mixing amount． After that，the paper carries on the mix proportion design for the porous asphalt mixture． Unlike the Marshall design methods for the common asphalt mixture，the design of porous asphalt mixture needs to ensure the aggregate gradation by controlling its void ratio first，then we get the range of optimum asphalt content by Cantabro Test and Schellenberg B