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REACT: Reducing Early-Age Cracking Today.


pdf icon REACT: Reducing Early-Age Cracking Today. (4493 K)
Bentz, D. P.; Weiss, W. J.

Concrete Plant International, No. 3, 56-61, 2008.

Keywords:

cracking (fracturing); concretes; construction materials; structures; mitigation; ASTM C 1608; thermal properties; shrinkage; stress (mechanics); temperature rise; curing agents; plastics; mortar; temperature; compressive strength

Abstract:

Concrete is generally viewed as a durable and long-lasting construction material. However, the long-term performance of a concrete structure can be greatly compromised by early-age cracking. One recent informal estimate from the industry places this as a $500 million problem in the U.S. alone, with some ready-mix companies experiencing early-age issues on as many as 70% of their jobs. As is often the case, as a problem intensifies, mitigation strategies are developed and promoted from the research laboratory to the field. This paper will briefly review the most common non-structural causes of early-age cracking and present an introduction to various mitigation strategies. These strategies are being further investigated as part of a newly formed university/industry/government collaboration under the acronym of REACT: Reducing Early-Age Cracking Today.