Evaluation of Dense Bridge Floor Concrete using High Range Water Reducer, May 1983

(1983) Evaluation of Dense Bridge Floor Concrete using High Range Water Reducer, May 1983. Transportation, Department of

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Abstract

Much effort is being expended by various state, federal, and private organizations to protect and preserve concrete bridge floors. The generally recognized culprit is the chloride ion from the deicing salt reaching the reinforcing steel, and along with water and oxygen, causing corrosion. The corrosion process exerts pressure which eventually causes cracks and spalls in the bridge floor. To prevent corrosion, the reinforcing steel has been coated; various types of "waterproof" membranes have been placed on the deck surface; decks have been surfaced with dense and modified concrete; decks have been electrically protected; and attempts to internally seal the concrete have been made. No one method has been proven and accepted by the various government agencies as being the "best" when considering the initial cost, application effort, length and effectiveness of protection. This research is an effort to prevent bridge deck deterioration by using a high range water reducing admixture (HRWR) to obtain a dense concrete that is workable during construction to prevent chloride intrusion.