Cracking Behavior of UHPC Slabs


The combination of fibers with traditional reinforcement may be a very interesting design solution to achieve more durable and economical structures. In this study, a total of seven slabs; six ultra high performance concrete (UHPC) slabs and one normal strength concrete slab were tested previously by the Author to observe the crack spacing and number of cracks in tension area, crack width and absorbed energy. Four slabs of UHPC with steel fiber of 0.5%, one UHPC slab with 1.1% steel fiber and one slab of UHPC without steel fiber were used in the analysis. For UHPC, the contribution of fibers to cracking in terms of crack width and spacing is significant when the amount of fibers increased. Also, normal strength concrete slabs have longer crack spacing as compared with UHPC members.