Quote:
Originally Posted by xoxoxoBruce
Yes, it's an epoxy paint like we use on airframes. Concrete doesn't stick to the iron work, it get it's purchase from the shape of (bumps on) the rebar.
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That was my initial impression (bumps/grooves on the rebar being that which the concrete"grips upon") If I recall correctly they are in a diamond pattern running the length of the rebar...annnywayyyyy... if the rebar is rusting those grooves intended to hold it together would be greatly diminished and that, coupled with the vibration of years of automobile, could lead to some type of faulty structure. I cannot imagine the engineers not accounting for this when the bridge was built. Unless that nifty de-icer they installe increased the degradation of the supporting rebar exponentially.
Does anyone know if this has been the reason for replacing/rebuilding a bridge of similar structure in the past?