Fresh and hardened properties of self-compacting high performance concrete containing nano-metakaolin as a partial replacement
Ansam Ali Hashim, Zahraa kazem rodhan, Saleem Jasim Abbas
Abstract
Abstract In this study, the effect of partial substitution of cement material with nano-materials represented by nano-metakaolin(NMK) has been studied on the fresh and hardening properties of High-Performance Self-Compacting concrete (SCHPC), where the substitution was made in different proportions, namely (1.25, 2.5 and 3.75). Four mixtures were made, the first reference and the remaining three mixtures in which the cement was partially replaced by the above mentioned proportions. Fresh characteristics represented by the Slump flow, T 5 0 c m, the L- box and the V- funnel were studied. As for the hardening properties, the compression and tensile strengths were examined. We observed through practical results that the Slump flow and L- box values decrease as the percentage of partial substitution of cement to nano-metakaolin increases. Whereas, T 5 0 cm and T v It increases with the increase in the partial substitution rate for cement with nanometakaolin. As for compressive strength and tensile strength, it increases with the increase in the percentage of partial replacement of cement with nano-metakaolin.