CONDITION ASSESSMENT OF RC STRUCTURES BY LINEAR POLARIZATION AND BY ACCELERATED CARBONATION EXPERIMENTS
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Published:2005
D P Mase, 2005. "CONDITION ASSESSMENT OF RC STRUCTURES BY LINEAR POLARIZATION AND BY ACCELERATED CARBONATION EXPERIMENTS", Repair and Renovation of Concrete Structures: Proceedings of the International Conference held at the University of Dundee, Scotland, UK on 5–6 My 2005, Ravindra K. Dhir, M. Roderick Jones, Li Zheng
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This paper presents an experimental work for carbonation and corrosion of steel re-bars by electrochemical methods and high accelerated carbonation experiments. Condition assessment and functional service life evaluation is done by the author on concrete, carbon steel and ferritic stainless steel re-bars. Author has done significant contribution on carbonation and corrosion study, part of which is presented in this paper. Carbonation of concrete causes depassivation of re-bars resulting in corrosion. The volume of re-bars increases causing tension in concrete resulting in cracking and deterioration. In this paper service life evaluation is done by 1) Diffusion, 2) Initiation, 3) Corrosion and 4) Deterioration. Severe ageing phenomenon of changing the properties of concrete, corrosion was investigated. Relationship of age of concrete and depth of carbonation was experimentally found by high-accelerated carbonation experiments. Electrochemical methods are used to find corrosion current density.
INTRODUCTION
EXPERIMENTAL SET UP FOR HIGH ACCELERATED CARBONATION EXPERIMENT (HACES) (Figure 1)
EXPERIMENTAL INVESTIGATION OF CARBONATION INDUCED CORROSION
AUTHORS CARBONATION DETERIORATION MODEL (For Normal Environmental Conditions)
CONCLUSIONS
REFERENCES
