TITLE:
Assessment of Deviation in Quality of Steel Reinforcing Bars Used in Some Building Sites in Cameroon
AUTHORS:
Patrick Che Bame, Bell Emmanuel Yamb, Billong Ndigui
KEYWORDS:
Eurocode 2, National Annex, Reinforcement Steel, Deviations, Yield Strengths
JOURNAL NAME:
World Journal of Engineering and Technology,
Vol.11 No.4,
November
29,
2023
ABSTRACT: The present work evaluated the deviations in the quality of steel
reinforcing bars in terms of markings, diameter, yield strength and ductility
in order to facilitate the drawing up of a yield strength value for the
Cameroon National Annex to Eurocode 2. The methodology of the work started with
the collection of steel samples from various active building project sites in
four different towns viz: Bamenda, Douala, Maroua and Yaoundé and testing their
tensile strength and elongation using a Universal Testing Machine and also
carrying out the bending test. Results show that bars without marked
manufacturer’s name fell all the tests. Other results show that 52% of all the
steel had yield stresses below 400 Mpa and the highest deviation in the yield strengths was 22.50%. The study recommends that
properly marked grade 500 steel bars should be adopted in the Cameroon national
annex to Eurocode 2.