Characteristics of ultra-high performance cementitious composites under explosion

Ultra-high performance cementitious composites (UHPCC) were prepared by substitution ofultra-fine industrial waste powder for large quantity of cement by weight and replacement of groundfine quartz sand with natural fine sand with the maximum particle diameter of 2.5 mm. And in theprepared UHPCC,the basalt stones with high elastic module and high strength were added,whosemaximum particle diameters was 15 and 10 mm,respectively. Nine contact-explosion tests were per-formed for concrete targets and the macroscopic damages were described. The explosive compressioncoefficients were computed by the explosion-induced infundibular crater size and a formula was pro-posed to calculate the explosion-induced infundibular crate depth. The results indicate that the pre-pared UHPCC have remarkable anti-explosion and anti-scabbing properties and that the explosioncompression coefficient is inversely proportional to the square root of tensile strength.