Impact resistance of concrete

Abstract

Fiber reinforced concrete (FRC) is a type of concrete that has gained popularity and drawn the interest of researchers all around the world in the last decades. The investigations have shown that FRC improves mechanical qualities noticeably, which has been adequately documented. FRC's impact behavior when mixed with Kevlar Fiber (KF) has yet to be investigated. The goal of this study is to see how KF and KF with steel fiber (SF) reinforced concrete perform in the drop weight impact test. Several FRC combinations were prepared and compared to a non-reinforced concrete as reference. In addition, hybrid FRC containing 2 types of fibers (B and C) were prepared and compared with a mono FRC containing one type of fiber (A). The total fiber percentage in hybrid FRC is equal to the fiber percentage in mono FRC (B% + C% = A %). As per the ACI 544 committee, all specimens were subjected to repeated mass impact testing. The number of impacts or hits to the first apparent fracture and failure, as well as the cracking pattern, were investigated. In addition, radioss software was used to create an explicit damage model. Fiber insertions, according to research, increase the number of hits until the first evident crack and failure. According to this research, inserting either SF or KF gave greater impact resistance, higher absorbed energy, and a longer failure time.