Suitability of Unrefined Metakaolin and Gear inner Wire for the Production of Reactive Powder Concrete
Suitability of Unrefined Metakaolin and Gear inner Wire for the Production of Reactive Powder Concrete
No Thumbnail Available
Date
2020
Authors
IBRAHIM, A.G.
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Reactive Powder Concrete (RPC) is an ultra-high strength concrete that is coarse aggregatefree
cement-based material. RPC constitutes of cement, Silica Fume (SF), fine sand, quartz
sand and steel fibre as its ingredients. SF and steel fibre are relatively expensive in Nigeria
due to their non-availability. Also, SF content of RPC is higher compared to conventional
concrete. This paper examines the effects of unrefined Metakaolin (MK) as substitute to silica
fume and Gear Inner Wire (GIW) as fibre on the properties of RPC. The unrefined MK used
in the production of the RPC was in four volume fractions by weight of cement (0% - 30%)
at an interval of 10% while GIW with 12mm length at a constant volume of 0.25% by weights
of concrete was used. The specimens were subjected to compressive, tensile and flexural
strengths tests for up to a curing age of 180 days. Control specimen with 20% SF was also
produced and tested. The results show that 20% unrefined MK can be used to produce RPC
with 72.5N/mm2 compressive strength and 0.25% GIW by weight of concrete can be used to
produce RPC with tensile strength and flexural strength of 7.1N/mm2 and 22.3N/mm2
respectively. It was concluded that 20% unrefined MK can suitably replace SF in RPC while
0.25% GIW can be used to enhance tensile and flexural strengths of the RPC. Therefore,
Nigerian unrefined MK and GIW are suitable in RPC production.
Description
Keywords
Citation
Department of Building, Ahmadu Bello University, Zaria aigetsofajabu.edu.ng