Development and Application of High Performance Green Hybrid Fiber-Reinforced Concrete (HP-G-HyFRC) for Sustainable and Energy-Efficient Buildings

Abstract:

The synergy of hybrid fibers allows for an enhanced concrete composite performance at a lower fiber volume fraction as compared to other types of fiber-reinforced concrete. This paper outlines the development process and properties of a new concrete composite termed high-performance green hybrid fiber-reinforced concrete (HP-G-HyFRC). Steel and polyvinyl alcohol (PVA) fibers were used as discontinuous reinforcement of the composite. Up to 60% of cement by mass was replaced by industrial wastes comprising slag and fly ash. At water-binder ratio of 0.25 and with the presence of coarse aggregates, careful proportioning of the mix constituents allows for a composite that is highly flowable. At a combined fiber volume fraction of only 1.65%, the composite also exhibits a deflection hardening behavior which is known to be beneficial for both serviceability and durability of structures. The composite was proposed to be used in an innovative double skin façade (DSF) system consisting of 30 mm air gap in between two thin HP-G-HyFRC skins with no main reinforcing rebars. It was shown that the DSF system alone allows for about 7.6% reduction of cooling energy in buildings.

• Periodical: Key Engineering Materials (Volumes 629-630)
• Pages: 299-305
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.629-630.299
• Online since: October 2014
• Authors: Rotana Hay, Claudia Ostertag
• Keywords: Deflection Hardening, Double Skin Facade (DSF), Green, High-Performance Concrete (HPC), Hybrid Fiber-Reinforced Concrete, Self-Consolidating, Sustainability

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