Analysis And Prevention On Disease Of The Asphalt Overlay On Old Cement Concrete Pavement

With the development of city to accelerate, our country a lot of city in the large-scaleexpansion, so many towns have gradually become urban area and center area. While a largenumber of urban road, where the road need after transformation into city road, the asphaltsurface layer has low engineering investment, construction period, traffic impact is little waitfor an advantage, it is the old cement concrete pavement asphalt overlay has become one ofthe most commonly used construction method.But due to lack of pertinence timeliness maintenance work, resulting in modified asphaltsurface layer appeared different degree of disease, affecting driving safety, comfort, andincrease the input of funds for maintenance and repair. So it is necessary to the old cementconcrete pavement reconstruction after asphalt pavement disease types of investigation andanalysis, find the disease reasons and types, analysis and transformation of the success orfailure of the project, for the old cement concrete road reconstruction design and constructionprovide a basis.This paper first discusses the old cement concrete pavement disease investigation andtreatment, and introduces the asphalt surface layer paving different design methods, and thenthrough the city road condition index on Guangzhou Nansha District Industrial Road four and5reconstruction of the old cement concrete road surface disease of asphalt after investigationand analysis, the survey of road PCI numerical calculation according to the analysis ofevaluation criteria, the main disease type and investigation on road usage. On the asphaltpavement common diseases causes and prevention, mainly analyzes the causes and preventionof reflection crack, in order to save repair funds, prolong road service life and put forwardreasonable suggestions.