Evaluation of recycled asphalt pavement in Colombia
Yung Vargas, Yee Wan | 2022-01-06
Reclaimed asphalt pavements are obtained from existing pavements through recovery
techniques and are used for new asphalt mixtures production with the inclusion of virgin
aggregates and asphalt cement, constituting environmentally friendly mixtures at a lower total
cost, by requiring fewer quantities of new materials. This research, unlike the studies found on
the subject, focuses on the study of reclaimed asphalt pavement by analyzing its granulometric
distribution and asphalt cement content. For this purpose, representative reclaimed asphalt
pavement samples were taken from four Colombia cities, to verify their heterogeneity. The
obtained reclaimed asphalt pavement was analyzed in the laboratory, to obtain the material
granulometric distribution, through extraction and asphalt content tests, following Colombian
regulations from the “Instituto Nacional de Vías”. The results show that the granulometry of all
cities has a central tendency (average) that moves towards an upper limit in the 2 mm particles.
When analyzing the granulometry separately of the four cities, it is observed that they present a
different trend in their granulometry, which shows their heterogeneity. The asphalt cement
content presented values between 4.0% and 5.0%.