Abstract
This paper presents the development of a green concrete mortarless interlocking hollow block. As part of efforts to promote sustainability, achieve increased durability and affordability, fly ash as a geopolymer binder and palm oil fuel ash are used as partial replacement for ordinary Portland cement (OPC) while waste glass and recycled concrete aggregate are used as replacement for fine aggregate. The research adopts three mix designs (MD) using various proportions of materials and an unconventional mix ratio of 1 : 1.35 : 3.5. MD 3 has the highest compressive strength and thus is adopted for FEM static analysis where the Von Mises stress is 41.12 MPa which is 1% lower compared to the experimental result (41.65 MPa). In comparison with other interlocking and conventional masonry blocks, the newly developed green concrete block with higher compressive strength indicates enhanced durability while promoting sustainability and is therefore considered suitable for construction purposes.
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