Review on fiber hybridization in ternary blended high-performance concrete

Abstract

The concept of adding fibers in concrete rapidly revolutionized the construction industry, making it a more superior material with enhanced engineering properties. Addition of discontinuous, randomly distributed fibers into the concrete mixture altered its inherent brittleness property. A huge number of experimental studies incorporating different types of fibers in both normal and high strength concrete have been done, leading to more practical applications. Fiber hybridization in concrete is an essential step into the future considering the fact that the composites containing two different fibers exhibit the advantages of both due to synergistic effect. High performance concretes nowadays essentially contain one or more supplementary cementitious materials. However, limited reports have been made explaining the pros and cons of a three-phase system of cementitious materials in hybrid fiber reinforced concrete. Since, the performance of fiber is largely dependent on the matrix type, the effects of ternary blends of cementitious materials such as fly ash, GGBS, silica fume and metakaolin in the hybrid fiber systems are a subject of much interest. This paper briefly discusses the performance of different types of hybrid fibers in combination with different ternary cementitious blends, and reviews the series of work done from the past to present studies and the future possibilities for hybrid fibers and SCMs for its higher utilization potential.