Research On Layout Of Recycled Pavement Material Warehouse For Expressway Asphalt Pavement In Jiangsu Province

In 2018,The expressway mileage reached 131,000 kilometers in China,ranked first in the world.However,a great number of the expressways have met their service life,therefore need to be rehabilitated or maintained.According to Ministry of Transport of the People’s Republic of China,China would mainly focus on road maintenance and rehabilitation rather than constructing new expressways in next decades.A huge amount of the reclmined asphalt pavement(RAP)material would therefore be generated in pavement manintenance or rehabilitation.A comprehensive recycling strategy is vital important in improving utilization rate of RAP,reduce the cost of road manintance,and minimize the negative impact on environment csused by the wasted RAP material.However,a scientific comprehensive recycling strategy comprehensive recycling strategy requires precise estimation of RAP production and consumption.Moreover,the RAP wearhouse location problem shoule be carefully investigated to further improve the efficiency of RAP regeneration.In this paper,the expressway pavement maintance decision database in Jiangsu province in 2018 was obtained.Based on which,an indepth analyze of expressway pavement conditions(PQI,PCI,PSSI,RDI,SRI,RQI)was carried out.Moreover,after data cleaning and analysis the pavement information database was established in ArcGIS.The third chapter calculated the expressweay RAP production in Jiangsu Province based on the pavement maintance decision database.The Machine Learing was used to predict the maintance decision,based on which,the predicted RAP production was obtained.By comparing the result between predicted RAP production and calculated RAP production,the accuracy of Machine Learing algorithm was investigated.In the fourth chapter,the AHP was adopted to analyze the applicability of different pavement recycling techniecs.For each maintance decision which generates RAP material,the pavement recycling technice was applied by conducting AHP analysis.The expressway RAP demand in Jiangsu Province was therefore calculated.The fifth chapter compared the expressway RAP production and demand in terms of spatial distribution.By further analyzing RAP production and demand of truck highway,the expressway-highway comprehensive recycling strategy was proposed.Additionally,the expressway uprading and expansion projects were taken into consideration to make a more precise prediction of RAP volume.In the sixth chapter,the geographic information model and expressway model were established in ArcGIS.By considering spatial distribution of RAP production and demand,transport distance and geographic environgment,the RAP wearhouse location was recommended.