Effect of Fly Ash and Ground Granulated Blast Furnace Slag on Fracture Parameters of Sustainable Concrete

The knowledge of fracture mechanics has a great importance for numerous structural applications for structures like dams, nuclear power projects etc. This paper concentrated on study of fracture parameters on concrete using Fly ash (FA) and ground granulated blast furnace slag (GGBS) as a supplementary cementitious material (SCM) to make concrete sustainable. The FA and GGBS ware partially replaced with cement with percentage of 10, 20, 30 and 40. The water to cement (w/c) ratio kept constant 0.38 for all mixes. The three point bend test was conducted on notched beams according to RILEM recommendation. The crack mouth displacement (CMOD) opening rate was maintained 0.05 mm/min. The mechanical and fracture parameters were studied, the results stated that the GGBS has shown improvement in fracture energy, fracture toughness and mechanical properties compared with FA. The presented result of research shows the usefulness of SCM in concrete.