Engineering Feasibility of Building Blocks Produced from Recycled Rice Husks

Atikpo E.1,*, Ukala D.C.1, Agori J.E.1, Agbi G.G.1, Iwemah E.R.1, Umukoro L.O.1 and Michael A.2

1 Department of Civil and Environmental Engineering, Faculty of Engineering, Delta State University, Oleh Campus, PMB 1, Abraka, Delta State, Nigeria
2 Department of Environmental Technology, Faculty of Environmental Sciences, Federal University of Technology, Owerri, PMB 1526, Imo State, Nigeria

*Corresponding Author:,

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 Vol. 3 No. 2  | October 2019 | Pages 410 – 415



Rice husks abundance in Nigeria requires the consideration of their alternate economic uses to prevent environmental pollution from the waste heaps, litter and combustion. This study focused on the determination of the feasibility of blocks made from recycled rice husks for building construction. Twenty-four absolute cubes were moulded from a mixture of fine aggregate (sand), binder (cement) and water. These were used for control experiments. Also, 144 cubes of partially replaced sand with rice husks in the steps of 10, 20, 30, 40, 50 and 60% were produced and cured for 7, 12, 21 and 28 days like the absolute cubes. They were weighed and experimented for some engineering properties including compressive strength in triplicate. The average values of triplicate readings were recorded and documented. Laboratory strengths result at the 28th day were compared with the reference strength of sandcrete block provided in the Federal Building Code to ascertain the performances of the partial sandcrete cubes. The low maximum compressive strength of 0.54N/mm2 obtained at 30% replacement and 28th day curing showed that rice husks were not feasible for replacing fine aggregate in sandcrete blocks at the percentages tested. This strength value is far less than the minimum allowable compressive strength of 1.75N/mm2 of individual blocks provided in Federal Building Code.

Keywords: Recycling, rice husks, housing blocks and construction industry

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Cite this article as:

Atikpo E., Ukala D. C., Agori J. E., Agbi, G. G., Iwemah E. R., Umukoro L. O. and Michael A., 2019. Engineering Feasibility of Building Blocks Produced from Recycled Rice Husks. Nigerian Journal of Environmental Sciences and Technology, 3(2), pp. 410-415.