Spall velocity of blast loaded concrete specimen

摘要

The paper is focused on measurement of spall velocity of blast loaded concrete samples. The tests were performed using small scale plain concrete tiles (300 × 300 × 34 mm). Small charges of Semtex 1A industrial plastic explosive (10 to 92 g) were used as shock wave generators, being placed in contact with the samples. The spall velocity was measured on the soffit using simple photonic Doppler velocimetry setup while the whole process of blast induced spall formation was recorded by high speed framing camera. The results and instrumental methods tested during these experiments will be useful for future measurements on real scale concrete slabs.