Experimental investigation on bending creep in cracked UHPFRC

Abstract

Investigations on ordinary fibre-reinforced concrete showed that the time-dependent deformations under tensile load in cracked concrete are larger than the deformations in uncracked concrete. The so-called tensile creep in the cracked cross section depends on some different factors like type of fibres, fibre content, load level, concrete mix, environmental condition, etc. Given the lack of sufficient data about tensile creep in ultra-high performance fibre-reinforced concrete (UHPFRC), a large experimental program financed by the DFG (Deutsche Forschungsgemeinschaft) was started at the University of Kaiserslautern.