Blast Resistance of SIFCON against Contact Detonation and Development of a Blast-Resistant Member using SIFCON

Abstract

Synopsis:The objective of this study was to clarify the spall-suppressing performance of slurry infiltrated fiber concrete (SIFCON) with fine straight steel fibers and to develop an efficient blast-resistant member using SIFCON. In the first part of this work, contact detonation tests were performed on 80 mm thick SIFCON slabs under the explosive charges of 130 g to 170 g. As a result, it was shown that the scaled concrete thickness of the spall limit can be reduced by almost 55% by using SIFCON as a replacement for normal concrete. In the second part of this work, experimental investigations were conducted regarding blast resistance of double-layered slabs composed of SIFCON on the back side and pre-packed concrete (PPC) on the detonation side.The results showed that an effective blast-resistant design can be achieved by counting on the effect of the SIFCON layer to capture the spall fragments generated in the PPC layer, rather than the effect of SIFCON to resist spall failure.