Corrosion of Steel Reinforcements in Concretes of Non-Coastal Areas - Case Study: Kigali, Rwanda

Author:

Abaho G.1,Pranesh M.R.1,Kumaran G. Senthil2ORCID

Affiliation:

1. Jain University

2. University of Rwanda

Abstract

It is the function of concrete cover to protect reinforcement against corrosion from environmental attack. However, reinforced concrete structures in most cases suffer from corrosion of steel reinforcement and their service lives will be reduced. The steel in concrete is always prone to corrosion attack, and the reason being that concrete cover is porous in nature. Fluids and dissolved ions can impregnate through pore space or through cracks and come in contact with reinforcement. Preventive maintenance is the best corrosion control mitigation measure for reinforced concrete structures. This paper highlights the causes of corrosion in non-coastal areas like Kigali in Rwanda. Condition assessment of two reinforced concrete buildings in Kigali has been made based on structural survey. It was found that Crack width varies up to 2mm in column and beams. It is also suggested that to improve the life span of the columns and beams by retrofitting with advanced materials and the new structures are to be constructed with corrosion monitoring systems.

Publisher

Trans Tech Publications, Ltd.

Reference8 articles.

1. British Standard BS EN 1990 (2002). Euro code. Basis of structural design,. BSI, London.

2. Pfeifer, D.W.; Landgren, J. L.; and ZOOB, A., Protective systems for New Prestressed and substructure concrete",, Report No. FHWA/Rd-86/193, Federal High Way Administration, Washington, D. C., 1987, 121pp.

3. Siemes, A.J.M. and Rostam, S. (1996).

4. Rasheeduzzafar, Al-Gahtani A.S; Al-Saadoun SS. Influence of construction practices on concrete durability. ACI Mater J 1989;86(6):566–75.

5. Schmidt rebound hammer from M/s. proceq, Switzerland as per the guidelines IS: 1311-(Part11)-1992-(Reaffirmed in 2004).

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