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Cathodic protection needed?

Cathodic protection needed?

Cathodic protection needed?

(OP)
Hello,
I am designing reinforced concrete abutments for a small (40' span) steel bridge in an environment where the abutments will be intermittently inundated with brackish water. The design life of the bridge is less than 50 years. I am not sure to what degree I should incorporate Cathodic Protection devices (such as some sacrificial plating) into the design. We intend on using a 5 ksi mix with a low water-cement ratio. I found plenty of reference to the utility of these corrosion protection systems, but I have not found any design standards.

Are these systems used very often for small, low traffic bridges?Any insight would be much appreciated.
Thanks,

Jeff

RE: Cathodic protection needed?

Cathodic protection systems are not all that common.  I would specify a dense concrete, control the quality through specification and inspection, and increase the cover.

A study done in the '80's by a German group on waterfront structures showed that achieving quality concrete and increasing the cover did more to mitigate rebar corrosion than any other procedure.

RE: Cathodic protection needed?

(OP)
Thanks for the helpful tip!

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