Reducing Early-Age Cracking in Concrete with Internal Curing

Mark Niemuth, Associate III

Internal curing technology is a relatively easy way to reduce the potential for early-age cracking in concrete with low water-to-cement ratios. This technology typically utilizes lightweight aggregates and super absorbent polymers to release water into the concrete mainly after setting has occurred. Over the last few years, several state departments of transportation have started specifying the use of this technology in order to minimize cracking in bridge decks. Join Mark Niemuth (a materials scientist from WJE's Janney Technical Center) as he explains the mechanisms of internal curing, how it is incorporated into a concrete mixture, how it differs from other crack mitigation strategies, and some other considerations to keep in mind when implementing this technology.