Standardization Issues in Africa: Bayesian analysis of physicogeometrical and mechanical characteristics of rebars in Ghana's construction industry

Assiamah, Sampson; Kankam, Charles K.; Banini, Emmanuel K.; Agyeman, Stephen; Adinkrah-Appiah, Kwadwo

doi:10.1016/j.jobe.2023.106835

Cited by 1 publication

(1 citation statement)

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“…A study by Assiamah et al (2023) evaluated the physical characteristics of reinforcement bars available in Ghana and concluded that local milling companies producing mild steel reinforcing bars should improve on the standardization of the diameter of reinforcing bars they produce. Dzogbewu and Arthur (2013) carried out comparative studies of locally produced and imported low-carbon steels on the Ghanaian market with two different batches of samples (rebars) from local and foreign producers with 12mm bars only.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation into Strength Properties of Ribbed Mild Steel Reinforcing Bars (RMSRBs) Produced by Local Companies in Ghana

Danso,

Sumaila

2024

IJEMM

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The construction of high-rise buildings has increased the production and demand of ribbed mild steel reinforcing bars (RMSRBs) in Ghana. This study aimed at investigating the strength properties of RMSRBs manufactured in Ghana from scrap metals. Three steel-producing companies were considered for this study. A total of 90 samples of 12, 16, and 20mm diameters with lengths of 500, 50, and 20mm were used for the study. The prepared specimens were subjected to tensile strength test, chemical composition analysis, micro-hardness test, and microstructure analysis. The results indicate that the average tensile strength of between 576.00 and 768.40N/mm2 were above the minimum tensile strength of 250N/mm2 recommended by ASTM E8/E8M-16a. The carbon equivalent values (CEVs) of between 0.287 and 0.333% obtained were almost within the range of 0.3 to 0.55% recommended by ASTM A706/A706M-09b. It was also identified that the average Vickers hardness values of between 255.76 and 295.38HV were acceptable. The microstructural images showed good distribution of the pearlite and ferrite of the core. One Way ANOVA results indicated that the differences in the tensile strength values for 12mm (p-value ˂0.000) and 16mm (p-value =0.001) were statistically significant, however, the 20mm (p-value =0.138) was not statistically significant. The study, therefore, concludes that the strength properties of the 12, 16, and 20mm diameters of the RMSRBs produced by the three different companies in Ghana meet the standard requirements, and are recommended for use by contractors for the production of reinforced concrete.

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Section: Introductionmentioning

confidence: 99%