Reviewing the behaviour of high volume fly ash based self compacting concrete

The current review article focuses on the behaviour of High Volume Fly Ash (HVFA) based Self Compacting Concrete (SCC) prepared with Natural Coarse Aggregates (NCA) and Recycled Concrete Aggregates (RCA). The overall performance of HVFA based SCC has been estimated from the observations of the available literature in terms of fresh, mechanical and durability properties. The utilization of coal ashes i.e. Fly Ash (FA) and Coal Bottom Ash (CBA) in SCC has become an attractive substitute for disposal, thus their impact on aforementioned properties has also been summarised briefly. The study also encompasses the characteristics and applications of coal ashes (used as binder and fine aggregates) and RCA (coarse aggregates). The outcomes of the various investigations depict that replacement of binder and aggregates affects the fresh; mechanical as well as durability properties of HVFA based SCC. The literature signifies that HVFA based SCC made with specified levels of coal ashes (FA/CBA) and non-conventional aggregates (RCA) do not inhibit the overall performance. Further, the study also supports in minimization of over pounding of natural assets for achieving the desired sustainability.