Civil Engineering and Architecture Vol. 7(6), pp. 278 - 285
DOI: 10.13189/cea.2019.070602
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Statistical Analysis and Corrosion Assessment of Nigeria Steel Rebars: Case Study South-West, Nigeria

Igibah Ehizemhen C ^*, Agashua Lucia O , Sadiq Abubakar A
Department of Civil Engineering, University of Abuja, Nigeria

ABSTRACT

Corrosion assessment of rebars is very essential to predict the behaviour of reinforced concrete structures in different host environmental conditions. It also highlights the limitations of the local rebars. From the analysis, the severity of aqueous solutions on rebars was in the order H₂SO₄ > HCl > Na₂SO₄ > H₂O for both imported and local bars, whereas the ratio of the severity of local to imported steel rebars in water, Na₂SO₄, H₂SO₄ and HCl were 1.59, 1.26, 1.79 and 1.20 respectively. All the steel bars experienced deterioration due to mass loss, characterized by colour change in all the solutions except NaOH solution where no visible reaction took place as H⁺ in the aqueous solution could not react with Na⁺ which is higher in the electrochemical series. Also, there is a smaller degree of uncertainty in the imported reinforcing bars size with COV in the range of 0.06 to 0.20 and the local reinforcing bars in the range of 0.25 to 0.75 for the same diameter size range. To end with, the findings would address permissible nominal cover for different host environment to prevent deterioration of steel reinforcement under chemical attack and in water.

KEYWORDS
Corrosion, Steel Bars, Lagos, Water, Sodium Sulphate

Cite This Paper in IEEE or APA Citation Styles
(a). IEEE Format:
[1] Igibah Ehizemhen C , Agashua Lucia O , Sadiq Abubakar A , "Statistical Analysis and Corrosion Assessment of Nigeria Steel Rebars: Case Study South-West, Nigeria," Civil Engineering and Architecture, Vol. 7, No. 6, pp. 278 - 285, 2019. DOI: 10.13189/cea.2019.070602.

(b). APA Format:
Igibah Ehizemhen C , Agashua Lucia O , Sadiq Abubakar A (2019). Statistical Analysis and Corrosion Assessment of Nigeria Steel Rebars: Case Study South-West, Nigeria. Civil Engineering and Architecture, 7(6), 278 - 285. DOI: 10.13189/cea.2019.070602.