Effect of Aqueous Solutions on Tensile Strength Characteristics of Commonly Used Steel Reinforcements in Nigeria

Source:
By:AUDU Mohammed Taiwo, Emmanuel Ndububa, Olarewaju Oluwole Kolade

DOI: https://doi.org/10.30564/jaeser.v2i2.680

Abstract:

The assessment of the performance of various local and imported steel reinforcements in aqueous media will contribute to the level of their engineering uses by assessing the degree of their deterioration thereby safeguarding the possible failures of structural elements whereby they are used. This study investigated the properties and durability of both local and imported steel reinforcing bars in Nigeria. Weekly durability assessments in terms of yield, tensile strength and modulus of elasticity for both local and foreign steel specimens were evaluated to compare the level of deterioration when fully immersed in distilled water, and in aqueous solutions (5% solution of H₂SO₄, HCl, NaOH, and Na₂SO₄ in distilled water over a period of six weeks. The severity of aqueous solutions on the tensile strength was in the order HCl> H₂SO₄ >NaOH> H₂O > Na₂SO_4, and HCl> H₂SO₄>NaOH> Na₂SO₄> H₂O for imported and local respectively. In conclusion, though the imported bars marginally satisfied the ASTM and BS standards in strength except in durability, but local steel bars did not meet the two requirements. 

 

References:

[1] WSA (World Steel Association). Sustainable-Steel-at the-cove of-a-green-economy, 2015. http://www.wordsteel.org [2] A.N. Ade. Assessment of quality of steel reinforcing bars used in Lagos Nigeria. International Research Journal of innovative Engineering, 2015, 1. [3] O. Ama Nti Osei. Steel reserve required for takeoff. The African Report, Paris, France, 2015, 68: 2-3. [4] E.I. Ohimain. Scrap Iron and steel recycling in Nigeria. Greener Journal of Environmental Management and Public Safety, 2013. [5] E.i. Ohimain and C.B. Jenakumo. Scrap metal recycling and valorization in Bayesa state, Nigeria. The Journal of materials Science, 2013. [6] https://collegegrad.com/industries/steel-manufacturing, 2019. [7] www.Azo.com. The properties and effect of manganese as an alloying element, 2016. [8] A. Nautiyal, M. Qiao , J.E.Cook , X. Zhang andT-S. Huang. High performance polypyrrole coating for corrosion protection and biocidal applications.Applied Surface Science, 2018, 427: 922-930. [9] R.T Foley. Role of the chloride ion in iron corrosion. www.research gate publication, 2013. [10] ASTM C808-75. American Standard of test materials. Standard guide for reporting friction and wear test results of manufactured carbon and graphite bearing and seal material, 2016. [11] ASTM B593-96. American Standard of test material for bending fatigue testing for copper- Alloy spring materials, 2014. [12] Janaina de Lima Rocha, Rafael dos Santos Pereira, Mara Cristina Lopes de Oliveira, and RenatoAltobelli Antunes. Investigation on the relationship between the surface chemistry and the corrosion resistance of Electrochemically Nitrided AISI 304 stainless steel. International Journal of corrosion, 2019. [13] Assessment of the Structural Performance of corrosion affected RC members based on experiment study and probabilistic modeling Sopokhem Lim, Mitsuyoshi Akiyama, Dan M. Frangopol, Dept of civil and Environmental Engineering, WESEDA University. [14] E.O. Egunjobi. Evaluating the quality of steel reinforcing bars. Unpublished final year student project, Department of Civil Engineering, Covenant Uivernsity Ota, 2014. [15] http://www.worldsteel.org/access , 2015.