Enhancing Concrete Properties with Corncob Ash in Interlocking Wall Blocks

This investigation examines the viability of corncob ash (CCA) as a sustainable substitute for cement in the formulation of interlocking concrete blocks (ICB) utilized in wingwall structures of bridges. The impetus for this study arises from the necessity to diminish the environmental footprint of construction materials and enhance the sustainability of infrastructure developments. By substituting varying proportions of cement (0%, 1%, 2%, 3%, and 4%) with CCA, this research seeks to evaluate the impact on the compressive strength, split tensile strength, and shear strength of the interlocking blocks. Comprehensive laboratory experiments were conducted to assess the mechanical properties of the CCA-modified concrete blocks. The findings revealed that a 2% substitution of cement with CCA produced the most advantageous results in compressive and tensile strength, indicating an optimal equilibrium between strength and material efficiency. Furthermore, the shear strength of the mortarless interlocking concrete blocks exhibited significant enhancement, suggesting improved structural performance. The results underscore the potential of CCA to effectively replace a portion of cement in concrete production, thereby fostering more sustainable and environmentally responsible construction methodologies without compromising structural integrity. This research advocates for the wider implementation of alternative materials in civil engineering, particularly in the context of critical infrastructure construction.