NIST Time|NIST Home|About NIST|Contact NIST

HomeAll Years:AuthorKeywordTitle2005-2010:AuthorKeywordTitle

Water Movement During Internal Curing: Direct Observation Using X-Ray Microtomography.


pdf icon Water Movement During Internal Curing: Direct Observation Using X-Ray Microtomography. (1235 K)
Bentz, D. P.; Halleck, P. M.; Grader, A. S.; Roberts, J. W.

Concrete International, Vol. 28, No. 10, 39-45, October 2006.

Keywords:

curing; water; x-ray microtomography; mortar; cements; size distribution; cements; hydration; compressive strength

Abstract:

Internal curing provides internal reservoirs that supply hydrating cement paste with the water needed to maintain saturation. This is especially critical during the first day of hydration in high-performance concretes, as without it, significant autogenous shrinkage and cracking can occur. In the study described in this article, three-dimensional x-ray microtomography was used to observe water movement from saturated lightweight aggregate used for internal curing of a high-performance mortar. The observations presented are supported by more conventional measures of performance.