Strength development of fiber reinforced selfcompacting concrete (RFSCC): Temperature effect on mechanical properties

Abstract

The strength development of Fiber Reinforced Self-Compacting Concrete (FRSCC) was investigated in this work. The variable is the heat curing at different temperatures (20°C and 60°C) applied at 7 and 14 days of curing of concretes studied. Two temperatures 20 and 60 °C were applied to samples with intermediate levels (depending on the drying method applied to precast concrete) for 18 hours in total. In this study, a Portland cement (CEMII), limestone fillers were used in the binders of FRSCC and the steel fibers are also used as reinforcement for concrete. The results show that the compressive strength to 14 days of concretes studied, increases with heating (60 °C) compared to that measured at 20 °C. Also, values of compressive strength of FRSCC at 14 days that are best to those obtained without 28 days curing treatment. Indeed, the compressive strength values of treated concretes (14jours) obtained are 15% and 25% respectively obtained for fibers reinforced self-compacting concretes made with 1.5% of steel fibers