Effects of nanomaterials on hardening of cement–silica fume–fly ash-based ultra-high-strength concrete

In this paper, the flowability, compressive strength, hydration heat, porosity and calcium hydroxide content of cement–silica fume–fly ash-based ultra-high-strength concrete (UHSC) incorporating either nano-silica (SiO 2 ) or nano-calcium carbonate (CaCO 3 ) were investigated. Test results showed that the flowability of UHSC was reduced by incorporating nano-silica and nano-calcium carbonate. After incorporating nano-silica, the hydration heat...