Suitability of Anthill Soil as a Supplementary Cementitious Material

John Kamau, Ash Ahmed, Paul Hirst and Joseph Kangwa
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John Kamau: Naylor Concrete Products, Barugh Green, Barnsley, S75 1HT, England, UK
Ash Ahmed: Senior Lecturer in Materials Science School of the Built Environment & Engineering Leeds Beckett University Civic Quarter Northern Terrace Leeds LS2 8AG
Paul Hirst: Civil Engineering Group, Leeds Beckett University, Civic Quarter, Leeds, LS2 8GA, England, UK
Joseph Kangwa: Civil Engineering Group, Leeds Beckett University, Leeds, England, UK. He is now with London South Bank University, Borough Road, Tower Block, London, SE1 0AA, England, UK

European Journal of Engineering and Technology Research, 2018, vol. 3, issue 7, 5-11

Abstract: Cement is the most utilised construction material and the second most consumed commodity in the world after water. It has been reported that the heavily energy-intensive processes that are involved in its production contribute about 7 to 10% to the total global anthropogenic carbon dioxide (CO2), which is the main cause of global warming; and are expensive economically. It is however possible, that energy and cost efficiency can be achieved by reducing on the amount of cement, and in its place utilizing Supplementary Cementitious Materials (SCMs), which require less process heating and emit fewer levels of CO2. This work aimed to provide an original contribution to the body of knowledge by investigating the suitability of Anthill Soil (AHS) as an SCM by testing for pozzolanic or hydraulic properties. Cement was replaced in concrete with AHS by weight at 0%, 5%, 7.5%, 10%, 15%, 20%, 25%, and 30% steps at the point of need. The 0% replacement was used as the reference point from which performances were measured. The chemical composition analysis by X-ray diffraction (XRD) showed that AHS contained the required chemical composition for pozzolans, while the compressive strengths achieved were above strength classes that are specified as being suitable for structural applications. The increase in compressive strength over time, density and workability behaviors of AHS were consistent with the characteristics of SCMs. All results across the tests showed good repeatability, highlighting the potential of using AHS as an SCM in concrete to enhance the sustainability and economic aspect of concrete, while at the same time improving its properties in both the wet and hardened states.

Keywords: Anthill Soil; Supplementary Cementitious Materials; Partial Cement Replacements; Pozzolans (search for similar items in EconPapers)
Date: 2018
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Persistent link: https://EconPapers.repec.org/RePEc:epw:ejeng0:v:3:y:2018:i:7:id:60785

DOI: 10.24018/ejeng.2018.3.7.785

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