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Modeling Corrosion Resistance of Reinforced Concrete Structures

A bare pavement policy for roads and highways initiated in the United States in the 1950’s has lead to a significant use of road de-icing salts during winter maintenance periods which has accelerated deterioration of reinforced concrete bridge structures. The cause is due to the now well recognized chloride induced corrosion of the plain (black) reinforcing steel resulting in spalling of the concrete cover. A Monte Carlo probability analysis was performed for three types of reinforcing steel based on the condition of the reinforced concrete bridge deck and the chloride exposure distribution for the State of Virginia. The diffusion of this chloride loading into concrete decks and its effects on service life of epoxy-coated rebar batch galvanized steel rebar and 316LN stainless steel rebar was then calculated. The behavior of chloride diffusion was considered for initial surface crack densities of 0 3 6 and 12% of the deck area. A low-permeability concrete typical of present practice in Virginia was used. The total present cost (TPC) and life-cycle cost (LCC) figures show that galvanized steel rebar provides the most cost-effective protection for reinforced bridge decks with a 100 year life.

Product Number: 51319-12873-SG
Author: Martin Gagne
Publication Date: 2019
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03719 NEW CORROSION PROTECTION METHODS FOR EXISTING REINFORCED CONCRETE STRUCTURES

Product Number: 51300-03719-SG
ISBN: 03719 2003 CP
Author: Prof. Efim Ya. Lyublinski, Dr. Donald A. Kubik, Eng. Ronnie A. Singh
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