The Research And Application Of The Old Pavement Technical Reformation

Many big city in Guangdong Province,have a very high density of urban road.Mostof city have appeared various damages from many years of use and lack of routinemaintenance. Main failure is longitudinal crack, transverse crack, reflection crack,net-shaped crack, rut, pot holes, polishing and so on. These diseases seriously affect thequality of road traffic, reduce capacity, reduce of road service life, be easy to have anaccident.This paper mainly rely on the pavement reformation engineering for the Asian Gamesin Guangzhou(contains11roads, about46.3km). Combined with the climate and trafficcharacteristics of Guangzhou area, researching the technology of old pavementreformation.The first, Through the pavement damages survey and pavement detection,analyzeand summarize the cause of the damages of the main road in Guangzhou。According to theanalysis results, determine the research direction and key of the technology of oldpavement reformation.The second, According to the damages type and characteristics,design correspondingmeasures of old pavement reformation. And study on all kinds of asphalt mixture designmethod.The third, Through design of mix proportion of asphalt mixture and roadperformance test,study on asphalt mixture and stress absorbing layer material, withGuangzhou characteristics (be Good at rutting, resistance to water damage, anti-slidingperformance, anti-cracking property). And comparison and selection of schemes frommaterial performance, economic.The last, Determining the scheme of old pavement reformation detail design,andobserve effect. Put forward shortcomings of this phase of study,and plan the next phase ofstudy direction.