Using beam and ENDB specimens to evaluate fracture characteristics of wavy steel fiber-reinforced self-compacting concrete containing different coarse aggregate volumes

This research has addressed the effects of coarse aggregate (CA) and wavy steel fiber (WSF) volumes on the self-compacting concrete (SCC) fracture parameters in beam and edge notched disk bend (ENDB) specimens using size effect and work fracture methods (SEM and WFM). Mix designs were based on 30%-60% CA volumes and 0.15%-0.45% WSF volumes, and 144 different-size notched beam specimens underwent 3-point bending tests. Results showed that increasing the CA volume and percent WSFs increased the SCC ductility in both SEM and WFM; increasing the WSF volume affected the fracture energy-compressive strength relationship negatively at 30% and 40% CA volumes, and increasing the WSF affected the mentioned relationship positively at 50 and 60% CA volumes. Finally, we predicted the relationship between the fracture parameters calculated with ENDB specimens and those of beam specimens calculated with SEM and WFM.