Performance of lightweight interlocking pavement concrete block composite made from breadfruit shell ash particle and Momordica angustisepala fiber via modified casting method

The development of low-cost, lightweight, and eco-friendly interlocking concrete pavement using sustainable materials, breadfruit shell ash particle (BFSAp) and Momordica angustisepala fiber (MAf), was investigated. The interlocking concrete was produced by partial replacement of cement with BFSAp from 5 to 30%. The density, water retention, splitting tensile, flexural compressive strength, and stress analysis of the developed composites concrete were determined. The flexural strength obtained in this work is far higher than the recommended standard for light traffic pedestrians (3MPa) and heavy-duty (5MPa) as per JIS A 5371 standard. The compressive strength obtained at 15% BFSAp is higher than the standard compressive strength of 55MPa as per ASTM C936. This formulation falls in the ranges of compressive strength for heavy-duty interlocking pavement. The use of the MAf and the BFSAp will reduce the cost of interlocking concrete pavement for housing and building since the MAf and the BFSAp are waste materials and can be obtained at a low cost.