Deterioration of concrete due to reinforcement steel corrosion
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Steel corrosion in concrete leads to cracking, reduction of bond strength, reduction of steel cross section and loss of serviceability. Reinforced concrete undergoing corrosion does not only give the appearance of poor performance, but can in extreme cases, lose its structural integrity.
Numerical relations to assess the loss of serviceability due to steel reinforcement corrosion are scanty, thus data to relate the rate of corrosion to cracking and loss of bond strength are necessary.
This paper uses laboratory data to investigate the effects of corrosion rate on cracking and bond strength loss.
It also examines the influence of fly ash on the rate of reinforcement corrosion.
The laboratory data is used to develop numerical models to predict:
1.
(a) rate of corrosion from the width and intensity of cracking
2.
(b) bond stress from corrosion rate, and
3.
(c) serviceability loss from corrosion rate.
Numerical relations to assess the loss of serviceability due to steel reinforcement corrosion are scanty, thus data to relate the rate of corrosion to cracking and loss of bond strength are necessary.
This paper uses laboratory data to investigate the effects of corrosion rate on cracking and bond strength loss.
It also examines the influence of fly ash on the rate of reinforcement corrosion.
The laboratory data is used to develop numerical models to predict:
1.
(a) rate of corrosion from the width and intensity of cracking
2.
(b) bond stress from corrosion rate, and
3.
(c) serviceability loss from corrosion rate.
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