The cement used in concrete can have a lasting impact on the life span of new concrete bridge decks. Learn how Type K cement for new bridge construction and rapid hardening cement for repairs and new overlays can help extend the useful life cycle of concrete bridge decks.
After 18 months of partial closures, the Lewis & Clark Bridge reopened six months ahead of schedule with the use of a high-performance, rapid-setting, latex-modified concrete (RSLMC) overlay.
Wider use of proven technologies that eliminate or reduce concrete cracking in old or new decks can reduce the billions of dollars spent annually in the United States on repair or replacement of bridge decks damaged by chloride-induced corrosion. Products used include Type K shrinkage-compensating cement and RSLMC.
The specification called for a compressive strength of 3,000 psi prior to opening to traffic. The Rapid Set Latex-Modified Concrete overlay achieved this strength within three hours of placement, allowing the bridge to open for traffic each evening, meeting the DOT’s requirement. Product used was RSLMC.
Using a fast-setting Rapid Set Cement for a Latex Modified Concrete Overlay instead of Type III portland cement, allowed schedules to be met despite unexpected delays.