Hi all,
I am a student researcher who does predicting the service life of the RC structures due to chloride admittance. I am trying to set up an empirical study to test the time for the concrete members to crack after initiation of corrosion. My test specimens will cover a vast range of different material properties such as W/C ratio, cover depth, bar diameter etc.
In order to corrode the samples, I am using impressed anodic current. And I will be monitoring the crack propagation on each sample until it reaches a prescribed crack width. Based on this, I am trying to establish a relationship how long it will take to crack the cover concrete. But the corrosion is done using the impressed current method.
So in this case, how things would be correlated to the natural corrosion?
Greetings
in our experience in the assessment of natural and accelerated embedded in concrete steel corrosion, there is no direct correlation in reference to time, however we found models lifespan for estimating useful life as the factor that initiates corrosion, carbonation and chloride ion penetration.
read the results suggest Duracon project:
Durability of concrete structures: DURACON, an iberoamerican project. Preliminary results
http://www.sciencedirect.com/science/article/pii/S0360132305001472
Effect of the marine environment on reinforced concrete durability in Iberoamerican countries:DURACON project/CYTED
http://www.sciencedirect.com/science/article/pii/S0010938X07000327
Try this paper for starters, http://ascelibrary.org/doi/abs/10.1061/%28ASCE%290899-1561%282003%2915%3A1%2841%29
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