Utilization of Different Supplementary Cementitious Materials and Recycled Concrete Aggregate for Stabilization of Pavement Base Layer

In developing countries like India, infrastructure development is one of the most important concerns. Hence, the destruction of old structures and the construction of new ones are on the rise. Therefore, one side, the outcome is huge demolition concrete waste and other side demanding high quantity of natural resources. Keeping view on this, in the present study, an attempt was made to understand the utility of demolition concrete waste in the form of recycled concrete aggregate (RCA) for stabilization of base layer of pavement. Addition to this, the conventional cementitious binder material also tried to replace with supplementary cementitious materials (SCMs) like pond ash and ground-granulated blast-furnace slag (GGBS) originated from iron and steel making. To observe the behavior of the abovementioned non-conventional materials, different laboratory investigations were done like CBR and UCS with different material combinations, and same were compared with conventional mix. From this experimental work, it was observed that, the mix prepared with RCA offered low results as compared to mix prepared with natural aggregate (conventional mix). But, addition with cement as binding material offered promising one. Similarly, a by-product named as GGBS offered good results with natural aggregate (NA). Hence, based on the abovementioned points, it may be recommended to use of the RCA with cement and NA with GGBS for stabilizing the pavement base layer for the construction of low volume roads which offers an economical construction as well as gives different environmental benefits.