Rehabilitation by In-situ Cold Recycling Technique Using Reclaimed Asphalt Pavement Material and Foam Bitumen at Vadodara Halol Road Project (SH 87) – A Case Study

摘要

Cold Recycling Technology (CRT) of worn out bituminous pavement is a relatively new technology which has important application in the road surface treatment and paving towards green highway. Due to economic and environmental constraints like reduction in construction cost, preservation of aggregate and binder, etc, more attention is turning towards recycling of bituminous surface as an alternative to conventional pavement rehabilitation. The objective of this paper is to analyze flexible pavement with insitu cold recycling technique using Reclaimed Asphalt Pavement Material (RAP) and Foam Bitumen. As a case study, pilot project consisting of segregated stretches having major distresses and totaling 10 km length were selected on Vadodara Halol Road Project (SH 87) where cold recycling technique using reclaimed material and foam bitumen was used as a part of rehabilitation of flexible pavement instead of conventional overlay in order to achieve economy and executing within limited time period. Various field as well as laboratory tests are conducted and representative cores were extracted to investigate the pavement characteristics. The results of tests conducted on the cold recycling surface are very encouraging and adopted CRT is found to be economically viable also.