Abstract
Static and dynamic characteristics of 3 sort of nano-concrete, 2.0 % nano-B4C, 2.0 % nano-CaCO3, and 2.0 % nano-B4C –1.0 % nano-CaCO3 co-doped concretes, were studied using a 100-mm split Hopkinson pressure bar (SHPB) testing system. There is a clear strain rate consequence for concrete's dynamic compressive strength (DCS) and impact toughness (IT) and energy dissipation (ED) as well as affect failure mode, as shown by the results, which reveal that NC is stronger and has a greater elastic modulus than PC under static load. Even though NC's dynamic elastic modulus increases while its dynamic compressive properties and peak strain all reduction at the same strain rate. There are no significant differences between NS and PC in terms of DCS, peak strain (PS), IT and ED. But whereas NC's static and dynamic mechanical characteristics declined, NSC's are roughly in the middle between PC's and NC, but it has seen an uptick. Nano-CaCO3 has enhanced compactness, decreased weak areas and optimized pore size distribution, whereas nano-B4C has evident internal weak areas and destroyed pore structure.
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