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The biggest problem with rebar rust is that it splits the concrete, weakening the structure. On the W-35 bridge, I'd be more concerned with the effect on exposed steelwork of the nasty road clearing chemicals. But keep in mind this is wild speculation and we'll have to leave it to the experts to cover... uh, make the final determination that it's nobody's fault.
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The descent of man ~ Nixon, Friedman, Reagan, Trump.
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