Influence of Hybrid Fibers on the Fresh and Hardened Properties of Structural Light Weight Self-Compacting Concrete

Abstract

The scope of this research is certainly to provide some experimental data on the effect of hybrid fiber on fresh and hardened properties of structural pumice lightweight aggregates self-compacting concrete (SLWSCC). Addition of hybrid fibers to concrete properties has changed the state of concrete from brittle to ductile. Slump flow test, L-box test, and V-funnel test were leading to find the (SLWSCC) workability of fresh properties. The mechanical properties of hardened (SLWSCC), including compressive, and splitting tensile, strengths, and moduli of rupture. Eleven concrete mixtures of (SLWSCC) with different mono and hybrid fibers contents of steel fibers (SF) and polypropylene (PP) fibers with a ratio (0%, 0.3%, 0.6%, and 1.2%) of volume fractions were prepared to study the change in its fresh and hardened characteristics. Test results were showed that the fibers whereas used in a hybrid form with (SLWSCC) be able to have as a result of high composite performance compared to their single thing fiber-reinforced concretes. The optimum properties of (SLWSCC) can get form mix (HF8) with 0.6% (SF) content and 0.3% (PP) fibers exhibit higher flexural strength behavior by 206%, and tensile strength of increased by 129%.