Effect of calcium nitrate on the workability and compressive strength of wood ash blended cement concrete
Akeem Ayinde RAHEEM, Oludayo Ajani AKINTOLA, Isaiah Oluwafemi OGUNTOLA, Favour Wuraola KOLAWOLE
Abstract. Wood ash (WA) is emerging as a potential Supplementary Cementitious Material (SCM). Incorporation of WA as a partial replacement for cement in blended cement concrete presents environmental and economic benefits. This study examines the effect of calcium nitrate on the workability and compressive strength of blended cement concrete with a view to enhance its performance. The chemical composition of WA, CN and OPC were analyzed using XRF. Wood Ash was substituted at 10% while CN was replaced at 1,2,3,4 and 5% by weight of OPC. The slump and compacting factor of the fresh concrete were determined. The compressive strength was determined after 7, 14, 21, 28, 56 and 90 days of curing. Wood Ash was found to be a class C pozzolanic material as the sum of SiO2, Al2O3 and Fe2O3 were 40.50%. The CaO content present in WA, CN and OPC were 46.27, 81.95 and 68.76%, respectively. The slump and compacting factor decrease from 39 to 19 mm and from 0.94 to 0.74 mm, respectively. The compressive strength of WA-CN varied from 14.08 to 46.24 N/mm2. It was observed that inclusion of CN and WA improved the w
Keywords
Wood Ash, Calcium Nitrate, Supplementary Cementitious Materials, Workability, Compressive Strength
Published online 3/25/2025, 9 pages
Copyright © 2025 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: Akeem Ayinde RAHEEM, Oludayo Ajani AKINTOLA, Isaiah Oluwafemi OGUNTOLA, Favour Wuraola KOLAWOLE, Effect of calcium nitrate on the workability and compressive strength of wood ash blended cement concrete, Materials Research Proceedings, Vol. 51, pp 49-57, 2025
DOI: https://doi.org/10.21741/9781644903537-6
The article was published as article 6 of the book Advances in Cement and Concrete
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
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