The fracture response of blended formulations containing limestone powder: Evaluations using two-parameter fracture model and digital image correlation

摘要: Abstract The fracture response of mortars in which OPC is partially replaced by limestone or a combination and fly ash/metakaolin (i.e., for total replacement levels 20% 35% volume) reported. blended demonstrate parameters (fracture toughness, K IC S critical crack tip opening displacement, CTOD c , determined using the two-parameter model, TPFM) that are comparable to better than those pure formulations spite having slightly lower compressive strengths systems. ternary blends containing metakaolin at show best performance: consequence beneficial limestone–alumina synergy has been previously established. strain energy release rates also trends line with other parameters. selected mixtures evaluated through non-contact digital image correlation technique found correspond well from TPFM. outcomes highlight improved ductility can be attained judicious use synergistic materials.