Mc Laren L. Baluyut, Lee Ann Carl T. Velasco, Nickel Tone Domini B. Dueñas, Mark Edrian Manlutac, Roy Byron Rueda and Jenilyn Aquino 2026. Chemical Treatment of Agricultural Waste Fibers from Pineapple Leaves and Manila Hemp used in Fiber-Reinforced Concrete Hollow Blocks. International Journal of Progressive Research in Science and Engineering . 7, 05 (May 2026), 68–79. DOI:https://doi.org/10.65138/ijprse.2026.v7i05.1291.