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Ezeh, J. C.
Department of Civil Engineering, Federal University of Technology, Owerri, Imo State, Nigeria
Awodiji, C. T.
Department of Civil Engineering, University of Port Harcourt, Choba, Rivers State, Nigeria.
Ibe, K. C.
Department of Civil Engineering, Michael Okpara University of Agriculture, Umdike, Abia State
ABSTRACT
Metakaolin is a calcined kaolin that can improve
strength and durability of concrete through acceleration of OPC hydration. This
work investigated the strength properties of concrete with partial replacement
(5% -50% at intervals of 5%) of cement with kaolin sourced from
Umuariaga-Umudike, Nigeria, calcined with temperatures (650°C, 750°C and
850°C). River sand (RS) and quarry dust (QD) was mixed with a M30 concrete
grade and water/binder of 0.4 at mix ratios of 1:1.68:2.32 and 1:1.42:2.04,
respectively. A total of 396 concrete cubes of 150mm were tested for
compressive strength (CS) and young modulus (YM) after curing by immersing in
water for 7 and 28 days respectively. The performance of the concrete calcined
at 750°C was highest at 20% metakaolin replacement, with CS, YM, values of
42.05MPa, 34.88GPa, for RS concrete and 38.02MPa, 33.16GPa, for QD concrete
respectively. The study showed that metakaolin is a highly reactive compound
that can be utilized in the construction industry to partially replace cement
by 20%
Keywords: Kaolin, Metakaolin, River sand, Quarry dust, binary concrete
https://doi.org/10.33922/j.ujet_v9i2_3
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Published
Monday, November 06, 2023
Issue
Vol.9 No.2, December 2023
Article Section
GENERAL
The contents of the articles are the sole opinion of the author(s) and not of UJET.
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