The Potential of Recycled Aggregates and Coconut Fiber in the Production of Concrete

  • Stephen Adeyemi Alabi The Federal University of Technology
Keywords: Sandcrete block, recycled coarse aggregate, coconut fibre, compressive strength, workability


The high cost of conventional construction materials has led researchers into the search for alternative construction materials that are sustainable and eco-friendly. This study investigates the effect of crushed sandscrete block as recycled fine aggregate (RFA) and crushed abandoned cubes as recycled coarse aggregate (RCA) with constant percentage of coconut fibre (CF) on the properties of the concrete. The normal aggregate concrete (NAC) containing normal aggregate (NA) without the addition of CF was first produced and tested. The second stage involved production of concrete comprising constant percentage of CF with 25%, 50%, 75% and 100% fine and coarse aggregate replacement by weight with RFA and RCA. Properties of fresh and hardened concrete for all specimen types with standard procedure to obtain an optimum mix design was determined. The results obtained from the study shows that the workability of all the replacements were found to be lower than that of the normal aggregate concrete (NAC). Compressive and splitting tensile strength test showed that at optimum replacement levels of 25% RCA and 25% RFA concrete have better strength performance than NAC. The study established that RCA and RFA is capable of partially replacing NA in concrete production in ternary form. The optimum percentage replacement of RCA, RFA and CF should be adhered to for effective performance.


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Author Biography

Stephen Adeyemi Alabi, The Federal University of Technology

I am presently a  lecturer in the Department of Civil Engineering of the Federal University of Technology, Akure, Nigeria, where I obtained my Master of Engineering degree in Structural Engineering in 2012 with Distinction. Also, I obtained my B.Eng degree in Civil Engineering at the Federal University of Technology, Akure, Nigeria in 2008 with first class honours as the best graduated student of my set. After my graduation I have been working as an Assistant lecturer in the same Department I graduated from, assisting in teaching of civil engineering materials, design of reinforced concrete structures and Structural Analysis and, this is evident in my having the highest scores in civil engineering materials and design of reinforced concrete structures during my undergraduate and postgraduate days. With my prior knowledge of the basic principles of Civil Engineering materials, Design of reinforced concrete structures, Structural dynamics, Structural Mechanic, Design of Structural and Structural Analysis, my working currently as a Research Assistant, zeal to research, composure, intelligence and academic prowess.


My main research interest is in use of innovative materials in building industry, risk analysis and strategies for management of engineering systems, numerical modeling with computer application in structural engineering. The  research topics include, behaviour of geopolymer concrete with recycled concrete aggregate, physico-mechanical properties of  concrete produced with different percentages of cigarette butts, behavior of granulated cupola furnace slag based geopolymer concrete at elevated temperature, probabilistic description of the progressive failure of a RC building frame under differential settlement, probabilistic model for compressive strength of a concrete using Akure pit-sand as fine aggregate, optimum mix design for minimum concrete strength requirement using pit-sand as fine aggregate, material-based ultimate moment of resistance of a reinforced concrete section. 

How to Cite
Alabi, S. A. (2020). The Potential of Recycled Aggregates and Coconut Fiber in the Production of Concrete. International Journal of Integrated Engineering, 12(8), 303-309. Retrieved from