Preliminary study on Performance of Steel Fiber Mortar under Bullet Impact and Blast loading

Abstract

The violence and unrest situation in Thailand still occurred continuously which the loss of many lives and properties. The protective structures are important to prevent the people from those losses. This study aims to investigate the performance of steel fiber reinforced mortar (SFRM) on impaction of bullet and blast resistance for used to the pre-cast protective structure. The experimental can be divided into 2 parts; 1) study on performance bulletproof of SFRM panel with 2% fiber (by volume) subjected with 7.62 mm bullet by varied the thicknesses. 2) study on the performance of SFRM panel to blast resistance by explosive with 0.5 lb. TNT at the scaled distance (Z) of 0.75 m/kg^1/3. The experimental results shows that the SFRM can be prevented the bullet with the thickness beyond 80 mm. The increase of the percentage of weight was observed with the thickness of panel below 80 mm. due to the spalling by bullet impaction. For the blast resistance test, a completely flexural fracture was observed on a plain mortar panel. Unlike, the SFRM panel only shows the small cracking due to steel fiber enhanced the impact resistance.