Capital Improvement & Infrastructure

Techniques for Preventing Shrinkage Cracking and Early Corrosion of Concrete Bridge Decks In Reserve

Demand for rapid construction procedures has resulted in the development of concrete mixtures with faster strength gains so that roads and bridges can be opened up quickly. This move has, however, resulted in the formation more drying and plastic shrinkage micro-cracks in concrete bridge decks and pavements. These micro-cracks are fast paths for the ingress of water and aggressive chemicals that can cause corrosion of steel and shorten the life-span of concrete elements. Traditional curing methods are no longer sufficient to protect against shrinkage cracking, and longer cure times negate the construction time savings of high early strength systems. Many new tools and techniques are available, however, not all are suitable for New Jersey’s climates and material availability. The proposed project would seek to determine the best tools and techniques for preventing drying shrinkage, plastic shrinkage, and prolonging the time to corrosion in concrete systems. The goals of this project are (1) develop updated guidelines and specifications for the use of fiber reinforced concrete, shrinkage reducing admixtures, curing compounds, and curing techniques in New Jersey; (2) create a set of guidelines and rules for acceptance of new or innovative shrinkage reduction materials; (3) benchmark the life-cycle cost of the materials and systems that can be used for drying shrinkage reduction; and (4) measure the impact of different types of shrinkage reduction systems on corrosion prevention.

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Archive: 2017 Ideas
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Archive: 2017 Ideas
Idea No. 51