Mix Design and Properties of Self-compacting Fibrous Concrete

Abstract

The development of self-compacting fiber reinforced concrete (SCFRC) marks an important milestone of the Brazilian building industry, because it combines the benefits of high fluidity in the fresh state, better performance on tensile strength and the control of the cracks. To an efficient performance, it is necessary a good granular mixture proportioning. Thus, the objective of this research is the evaluation of the influence on fiber contents in self-compacting concrete of 40 MPa and its properties in fresh and hardened state. The difference of the concretes was the volume levels of the steel fibers in each mixture proportioning: SCC0F (no addition), SCC0.5F (0,5% in volume) and SCC1F (1,0% in volume). The concrete mix design was based in the compressible particle model. The results show that the insertion of steel fibers interferes diminishing the workability and fluidity of the mixtures and improve the tensile strength.