This study investigates the viability of incorporating black rice husk ash as a supplementary cementitious material in concrete formulations. The research examines the properties of black rice husk ash, primarily amorphous and partially crystalline silica with a mean particle size of 12 µm, and its application in conventional concrete, self-consolidating concrete (SCC), and high-volume fly ash SCC. The study details tests conducted on both fresh and hardened concrete properties, including slump, slump flow, electrical resistivity, ultrasonic pulse velocity, chloride ion penetration, sulfate attack, length change, porosity, and water absorption, to assess the impact of this novel material.

The research definitively proves the potential applications of black rice husk ash in concrete, demonstrating that up to 20% replacement of cement can be achieved without negatively impacting strength and durability in both conventional and self-consolidating concretes. Furthermore, the study highlights the possibility of creating high-volume fly ash SCC with significant compressive strength using reduced cement content when combined with black rice husk ash. This work offers valuable insights for sustainable construction practices by utilizing agricultural waste products.