Evaluation of Dense Bridge Floor Concrete using Superplasticizer, HR-192, 1977

(1977) Evaluation of Dense Bridge Floor Concrete using Superplasticizer, HR-192, 1977. Transportation, Department of

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Abstract

Much effort is being expended by various state, federal, and private organizations relative to the protection and preservation of 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. The reinforcing· has been treated and coated, various types of "waterproof" membranes have been placed on the deck surface, decks have been surfaced with dense and modified concretes, decks have been electrically protected, and attempts to internally seal the concrete have been made. As of yet, 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, etc.

Item Type: Departmental Report
Keywords: Bridge decks, Chlorides, Durability, Portland cement concrete, Service life, Superplasticizers, Water reducing agents
Subjects: Transportation
Transportation > Materials
Transportation > Bridges and tunnels
Transportation > Roads and highways
Transportation > Research
Transportation > Research > Concrete
ID Code: 17025
Deposited By: Iowa DOT Library
Deposited On: 03 Jun 2014 16:05
Last Modified: 06 Jan 2015 16:32
URI: http://publications.iowa.gov/id/eprint/17025