Laboratory investigation of concrete paver blocks containing RAP aggregates, fly ash and GGBS

A significant issue in India is the inadequate provision of infrastructure for pedestrians and non-motorized vehicles. Most road infrastructure constructed lacks adequate provisions for pedestrian safety and convenience. Paver blocks are widely used for constructing pedestrian and non-motorized vehicle facilities due to its aesthetic appeal, walking comfort, exceptional durability, and low maintenance requirements. The predominant type of paver blocks that are utilized are Concrete Paver Blocks (CPB). The environmental ramifications of raw material extraction for concrete are significant, underscoring the necessity to investigate sustainable alternatives. This study aims to investigate the utilization of flyash and GGBS as supplementary cementitious materials (SCMs) and reclaimed asphalt pavement (RAP) aggregates as a replacement for coarse and fine aggregates in CPB. The focus of the study is on evaluating the strength, durability, and abrasion characteristics of the sustainable CPBs. The results of the study indicated that use of RAP as aggregate substitute resulted in slightly inferior properties in strength, durability and abrasion. However, the use of SCMs resulted in a mix with properties similar to that of the control mix. The research indicates that using RAP with SCMs enhances performance of CPB and might serve as an eco-friendly and sustainable substitute for traditional CPBs.