In the Philippines, agricultural waste-by-products is an environmental concern. This study investigated the possibility of utilizing agricultural lignocellulosic plant fiber (LPF) in the development of green reinforced composites for concrete masonry blocks (CMB). Specifically, this study determined the external morphology and orientation of materials that make up the LPF; the chemical composition of the rice husk ash (RHA), coconut fiber, and rice husk; the difference of the CMB with 0%, 5%, 10% and 15% concentrations of LPF mixed with varying ratio of cement, sand, RHA (cement:sand: RHA:LPF) in terms of its compressive strength after 7, 14, and 21 curing days. This study made use of four setups, each setup with varying concentrations of 0%, 5%, 10%, and 15% LPF. Batch formulations for each setup were prepared by ratio (cement: sand: RHA:LPF). and mixed thoroughly. All samples were cured for a period of 7, 14, and 21 days for mechanical testing in terms of its compressive strength. Results of this study showed that the compressive strengths of the concrete blocks increased as the percentage of the natural fibers has increased. Using lignocellulosic plant fiber (LPF) from agricultural waste in producing green composite materials significantly respond to the twenty-first century’s environmental challenges: slows down the resource depletion, lowers the pollution, and establish shared responsibility towards resource productivity. Thus incorporating waste materials and reducing the use of natural aggregates is an acceptable performance on saving natural resources.
