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11003 Modelling the Rate of Deterioration of Reinforced Concrete Structures

Picture for 11003 Modelling the Rate of Deterioration of Reinforced Concrete Structures
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Product Number: 51300-11003-SG
ISBN: 11003 2011 CP
Author: John Broomfield
Publication Date: 2011
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A number of models are available for predicting time to corrosion and time to cracking of reinforced concrete structures subjected to chloride or carbonation induced reinforcement corrosion. However, there are few models that try to predict rates of overall deterioration. This paper looks at some simple models that can be generated in spreadsheets and how they can be used to predict deterioration rates in a range of new and existing reinforced concrete structures. Several case histories are given of their application to new and existing reinforced concrete structures where estimation of time to corrosion and rate of damage have led to cost effective repair solutions and the avoidance of major replacement works. However, the time to cracking and the deterioration index calculations need further field validation to check their validity and their usefulness is providing structure owners with deterioration rates.

Key words: reinforcement corrosion, corrosion rate, delamination, spalling, chloride content, depassivation.
A number of models are available for predicting time to corrosion and time to cracking of reinforced concrete structures subjected to chloride or carbonation induced reinforcement corrosion. However, there are few models that try to predict rates of overall deterioration. This paper looks at some simple models that can be generated in spreadsheets and how they can be used to predict deterioration rates in a range of new and existing reinforced concrete structures. Several case histories are given of their application to new and existing reinforced concrete structures where estimation of time to corrosion and rate of damage have led to cost effective repair solutions and the avoidance of major replacement works. However, the time to cracking and the deterioration index calculations need further field validation to check their validity and their usefulness is providing structure owners with deterioration rates.

Key words: reinforcement corrosion, corrosion rate, delamination, spalling, chloride content, depassivation.
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