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- Title
IMPACT OF KAOLIN CALCINATION TEMPERATURES ON THE COMPRESSIVE AND FLEXURAL STRENGTHS OF METAKAOLIN--CONCRETE.
- Authors
ABIODUN, Yetunde O.; ORISALEYE, Joseph Ifeolu; ADEOSUN, Samson O.
- Abstract
The exploitation of pozzolanic materials in concrete construction is progressively increasing. This is due to technological advancement and climate change problems associated with carbon emission resulting from the large--scale manufacturing of cement and its usage for concrete production. In this study, metakaolin was used to partially substitute cement in metakaolin--concrete. Calcination temperatures of kaolin were varied from 500°C to 800°C at an interval of 100°C for 60 minutes. Metakaolin was used to replace cement at 0, 5, 10, 15, 20 and 25 wt. % using mix ratio 1:2:4 and 0.4 water--cement ratio. Compressive strength test was carried out at curing ages of 7, 28 and 90 days while flexural strength test was performed at curing ages of 28 and 90 days. For both compressive strength and flexural strength, 15 wt. % replacement with metakaolin gave the best strength values at all temperatures. Increase in temperature led to significant increase in strength of metakaolin--concrete. ANOVA showed all factors significantly affected the flexural strength (P<0.1) whilst the calcination temperature was significant (P<0.1) to the compressive strength. This study showed that metakaolin is a potential alternative to cement and can be used in the construction industry and that calcination temperature of kaolin has significant effect on the properties of metakaolin--concrete produced.
- Publication
Annals of the Faculty of Engineering Hunedoara - International Journal of Engineering, 2022, Issue 4, p41
- ISSN
1584-2665
- Publication type
Academic Journal