keywords: Millet Husk Ash (MHA), Polypropylene fibre (PPF), self-compacting concrete, Mechanical properties.
Fiber-reinforced concrete (FRC) is a concrete comprising fibrous material which strengthens its structural integrity. It contains short discrete fiber that are uniformly distributed and randomly oriented. In addition, the character of fiber-reinforced concrete changes with varying concretes, fiber materials, geometries, distribution, orientation, and densities. This study examined the physical and chemical properties of MHA as a pozzolana and grade 40 (control) SCC obtained from series of trial mixes using 0.35 water-cement ratio. Other mixes were derived from the control mix by replacing cement with 0, 5, 0.2, 0.4, 0.6, 0.8 and 1 % by weight of PPF, respectively. The research reveals that Polypropylene Fibre (PPF) has been established to be a suitable fibre for production of self-compacting concrete. It has tensile strength between 300 – 700 N/mm2. Similarly, the compressive strength of MHA modified SCC can be improved using up to 0.4 % PPF content. However, up to 1.0 % PPF content improves the splitting tensile and flexural strengths of Millet husk ash modified self-compacting concrete. 0.4 % PPF is recommended for optimum performance in Millet husk ash modified self-compacting concrete. However, up to 1.0 % could be used in structural members where flexure is important.