MIX DESIGN OF HMA AND CMA FOR POTHOLE REPAIRS

Abstract

Development of potholes on flexible pavements is very common phenomena during monsoon and after monsoon in India. Problems of road distresses, especially problems of potholes on flexible pavements are becoming more dangerous for users. Potholes are not only cause for road accidents but also they are creating discomfort to passengers. Generally hot mix is used by government for patch work of potholes. But in rainy season hot mix plants are closed, so hot bituminous mix is not available for filling of potholes. Also considering heating temperature required for hot mix which is around 1800C, there is a big problem of environmental pollution. Generally people use conventional methods like murum filling or aggregate filling etc, but these methods provide temporary convenience for passengers and after some time again potholes are formed. Various readymade patching materials are also available in market for patching works, but considering costs, they are uneconomical. In this study the approach is made towards new cold mix which can be used in rainy season also for patching works. The aim of the study is to prepare a economical cold patching mix which can be used for patching works at normal temperatures. Road survey is carried out for classification of potholes based on their actual dimensions to decide upon sizes of precast Hot Mix Asphalt blocks.