Performance of SIFCON based HPFRCC under Field Blast Load

Abstract

Abstract As the threat of global terrorism increases a demand for reinforced concrete structures as a physical protection also become important. The protective structures are to withstand sudden occurrence of dynamic loads like terrorist impact and blast attacks as well as vehicle and industrial accidents. In order to resist such an expected loading, the HPFRCC (High Performance Fiber Reinforced Cementitious Composite) materials may take an appropriate role by its increased fracture energy absorbing capacity. The slab member was 100mm thick and 2000mm squared SIFCON (Slurry Infiltrated Concrete) based HPFRCC and the outer surface was wrapped basalt fiber sheet. By wrapping the basalt, the specimen may attain more confining effect and the final HPFRCC is named as KNU HPFRCC. The SIFCON has about 80MPa compressive strength with steel fiber volume fraction of 5%. The used steel fibers were 60mm long with 80 aspect ratio and its tensile strength was 1100MPa. The slurry composed of ordinary Portland cement, water, fine sand and silica fume. A field blast test was performed with a HPFRCC slab against 100kgf TNT and stand-off distance of 5m. The study investigates the behavior of KNU HPFRCC. This study investigates the performance of KNU HPFRCC in terms of the field explosion blast load test. Figure 1 shows KNU HPFRCC slab specimen after the blast load test.