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Green economy and innovation: compressive strength potential of blended cement cassava peels ash and laterised concrete
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: EE Agbenyeku --- Department of Civil Engineering Science, Faculty of Engineering and the Built Environment, South Africa FN Okonta --- Department of Civil Engineering Science, Faculty of Engineering and the Built Environment, South AfricaThis work highlights the incorporation of two locally available materials, cassava peels ash (CPA) and laterite, in concrete production for construction purposes. The abundance of these materials in West Africa paved the way for this study. The effect of partial... -
Modelling the effects of petroleum product contaminated sand on the compressive strength of concretes using fuzzy logic and artificial neural networks: A case study of diesel
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Chidozie Chukwuemeka Nwobi-Okoye --- Faculty of Engineering, Nigeria Ikechukwu Etienne Umeonyiagu --- Department of Civil Engineering, NigeriaIn this study an artificial neural network (ANN) and fuzzy logic (FL) were used to predict the compressive strength of concrete produced with diesel contaminated sand. Concrete was produced using sand contaminated with diesel at 0, 0.5, 1, 1.5, 2,... -
Effect of rubber crumb on the microstructural properties of concrete
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: J.O. Akinyele --- Department of Civil Engineering, South Africa R.W. Salim --- Department of Civil Engineering, South Africa W.K. Kupolati --- Department of Civil Engineering, South AfricaThis study evaluates the effect of rubber crumb on the microstructural properties of concrete which was used to partially replace fine aggregate by 0, 4, 8, 12, and 16% proportion and designated as M0, M4, M8, M12, and M16 respectively... -
Experimental comparison of selected pozzolanic materials
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: K. A. Olonade --- Department of Civil Engineering, Nigeria M. B. Jaji --- Department of Civil Engineering, Nigeria O. A. Adekitan --- Department of Civil Engineering, NigeriaDifferent pozzolanic materials are commonly used in concrete production with different properties. This paper compared the performance of metakaoline (MTK), bamboo leaf ash (BLA), pulverized fly ash (PFA) and corn cob ash (CCA), when used as partial replacement for cement... -
The use of granulated plastic waste in structural concrete
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: J. O. Akinyele --- Department of Civil Engineering, Nigeria A. Ajede --- Department of Civil Engineering, NigeriaThis work looked at the ways in which waste plastic can be effectively recycled as an alternative material in concrete production. The granulated plastic waste was used to partially replace fine aggregate (quarry dust) at 0, 5, 10, 15, and... -
Effect of cassava starch on shrinkage characteristics of concrete
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Akindehinde Ayotunde Akindahunsi --- Department of Civil Engineering, Nigeria Wolfram Schmidt --- BAM Federal Institute for Materials Research and Testing, GermanyThe use of starch and its derivatives in concrete as an admixture to modify relevant properties of concrete has been on the increase in recent times. It is known to modify the rheology, affect the hydration kinetics of cement, and... -
Diaphragm wall and piles set record in Africa: Foundation for Africa’s largest suspension bridge in Mozambique
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Joern Seitz --- GAUFF GmbH & Co. Engineering KG, Mozambique/Germany Bai Pengyu --- CRBC China Road and Bridge Corporation, China Wang Gang --- CRBC China Road and Bridge Corporation, ChinaAs part of the master plan for the infrastructure of the road network in the southern Africa area, a suspension bridge is being built in Maputo, Mozambique. The bridge over the Maputo Bay has an open span of 680 m between... -
Materials and technology solutions to tackle the challenges in daily concrete construction for housing and infrastructure in sub-Saharan Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Wolfram Schmidt --- Department 7: Safety of Structures Bundesanstalt für Materialforschung und -prüfung (BAM), Germany Nsesheye Susan Msinjili --- Department 7: Safety of Structures Bundesanstalt für Materialforschung und -prüfung (BAM), Germany Hans-Carsten Kühne --- Department 7: Safety of Structures Bundesanstalt für Materialforschung und -prüfung (BAM), GermanySub-Saharan Africa's economic rise has caused a high demand for housing and infrastructure. This rapid growth has resulted in urgent challenges of enormous dimensions for urban and infrastructural planners and the entire construction sector. Considering the African supply chains and... -
Evaluation of temperature effects on grade 20 concrete using response surface methodology
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Richie I. Umasabor --- , NigeriaThis paper examined the evaluation of temperature effects on grade 20 concrete using response surface methodology. An experimental research design was adopted, which produced fifty-one (51) concrete specimens. The specimens were cured and tested at 7, 18, and 28 days,...