Coconut shell ash as a substitute for cement: effect of calcination temperature

Keywords: coconut shell, agro-waste, heat-treatment, mechanical properties, cost analysis


The disposal of coconut shell is a waste problem in countries where coconut production is in abundance. When coconut shell is calcinated produces ashes, which are a potential binder material to concrete preparation. In this work, coconut shell was calcinated at 400, 500 and 600 °C for 3 h. The ashes produced were employed as cement substitute. The characteristics of ashes were evaluated by surface area and XRD. The effect of replacing ashes as cement substitute was evaluated by workability and mechanical strength test. Experimental results demonstrated that 600 °C is the most suitable burning temperature for CSA calcination with amorphous SiO2 and low surface area. Results showed that, in contrast to control concrete, that burning temperature decrease concrete workability of concrete. Further, the increasing of burning temperature of coconut shell improves the mechanical strength. The compressive strength of mixture incorporating the ashes of coconut shell burned at 600 °C was higher than the others. Additionally, this temperature was found convincing considering cost to prepare the ashes.


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Author Biographies

Ceiler Fabian Cossio-Mena, Universidad Cooperativa de Colombia

Universidad Cooperativa de Colombia. Medellín, Colombia

Eliana Williams-Urango, Universidad Cooperativa de Colombia

Universidad Cooperativa de Colombia. Medellín, Colombia

Dissy Giselle Palacios-Mosquera, Universidad Cooperativa de Colombia

Universidad Cooperativa de Colombia. Medellín, Colombia

Oscar Felipe Arbelaez-Perez, Universidad Cooperativa de Colombia

Universidad Cooperativa de Colombia. Medellín, Colombia


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How to Cite
Cossio-Mena, C., Williams-Urango, E., Palacios-Mosquera, D., & Arbelaez-Perez, O. (2023). Coconut shell ash as a substitute for cement: effect of calcination temperature. ITECKNE, 20(2).
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