Long-Term Performance of Pavement Structures with Cold In-Place Recycled Base Course

Audrius Vaitkus, Judita Gražulytė, Andrius Baltrušaitis, Jurgita Židanavičiūtė, Donatas Čygas

Abstract


Properly designed and maintained asphalt pavements operate for ten to twenty-five years and have to be rehabilitated after that period. Cold in-place recycling has priority over all other rehabilitation methods since it is done without preheating and transportation of reclaimed asphalt pavement. Multiple researches on the performance of cold recycled mixtures have been done; however, it is unclear how the entire pavement structure (cold recycled asphalt pavement overlaid with asphalt mixture) performs depending on binding agents. The main objective of this research was to evaluate the performance of cold in-place recycled asphalt pavements considering binding agents (foamed bitumen in combination with cement or only cement) and figure out which binder leads to the best pavement performance. Three road sections rehabilitated in 2000, 2003, and 2005 were analysed. The performance of the entire pavement structure was evaluated in terms of the International Roughness Index, rut depth, and pavement surface distress in 2013 and 2017.


Keywords:

cold in-place recycling (CIR); cold recycled asphalt pavement; International Roughness Index (IRI); pavement surface distress; reclaimed asphalt pavement (RAP); rut depth

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References


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DOI: 10.7250/bjrbe.2021-16.523

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