TITLE:
Comparative Evaluation of the Chemical Composition and Physical Properties of Reinforced Concrete Steel Bars Used in Construction in Senegal
AUTHORS:
El Hadji Amadou Fall Sy, Dame Keinde, Malang Bodian
KEYWORDS:
Local Manufacturing, Reinforced Concrete, Durability, Eurocode 2
JOURNAL NAME:
Open Journal of Civil Engineering,
Vol.13 No.2,
June
14,
2023
ABSTRACT: This article presents, the study of a comparative evaluation of the
chemical composition and physical properties, linear mass deviations, of four
(04) types of steel used in the construction sector in Senegal. Type 1 (E1), Type 2 (E2) and Type 3
(E3) steels are produced by locally established companies and Type 4 (E4)
witness bars are imported from the France. The chemical analyses of the different types of steel were
carried out by combustion, infrared (IR) detection for carbon and sulfur, by reducing
fusion for nitrogen and by optical emission spectrometer (SEO) for the rest of
the elements. The composition was determined on bars with a diameter
of 10 mm. Linear mass deviations were evaluated for steels with a diameter of 8
mm, 10 mm and 12 mm. The results of the chemical analyses showed that the limit
value for the percentage of carbon was exceeded by 29.16% for the steel, type
3. For the other types (1, 2 and 4), the limit values set out in the French
standard NF EN 10,080 are not exceeded. As regards the relative
differences in mass, the results
showed that for steels of local manufacture, all the samples of bars with
diameters 10 and 12 mm and 33% of steels with diameters 8 mm do not comply with
the standard. The results also indicate that the chemical composition and relative linear mass deviations of the steels, type 4
comply with the standard. Thus, locally manufactured steels are not always
suitable for use in reinforced concrete constructions.