Influence of nano-silica on the failure mechanism of concrete specimens

摘要: Failure of basic structures material is usually accompanied by expansion interior cracks due to stress concentration at the tip. This phenomenon shows importance examination failure behavior concrete structures. To this end, 4 types mortar samples with different amounts nano-silica (0%, 0.5%, 1%, and 1.5%) were made prepare twelve 50x50x50 mm cubic samples. The goal study was describe micro-crack growth cement mortars in presence particles control during curing days. under compressive strength sensed acoustic emission technique (AET) It concluded that addition could modify Also, monitoring parameters exposed differences nanoparticles. Mortar revealed stronger shear mode characteristics than those without nanoparticles, which high activity heterogeneous matrix. worth mentioning highest for 3 7 test ages obtained from 1.5% particles. On other hand maximum 28 days 1% combination