Browsing by Author "Ojumu, Victor Tunde"

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    Fly ash-based geopolymer building materials for green and sustainable development
    (MPDI, 2020) Eze, Chuks Paul; Kalombe, Rosicky Methode; Ojumu, Victor Tunde
    This study reports on formulations and conditions for producing fly ash-based geopolymers with a view to showing that the compressive strength required for construction applications can be obtained without the addition of aggregates, sand, and/or cement. It was shown in a series of experiments constituting at least 73% fly ash that a compressive strength of up to 90 MPa can be obtained depending on the curing conditions. While high alkalinity resulted in stronger materials, the results showed about 40% savings in CO2 emissions without using sand and cement. Such materials are suited for construction applications with minimal environmental impact.