- Author
-
Bentz, D. P.
|
Halleck, P. M.
|
Grader, A. S.
|
Roberts, J. W.
- Title
- Water Movement During Internal Curing: Direct Observation Using X-Ray Microtomography.
- Coporate
- National Institute of Standards and Technology, Gaithersburg, MD
Los Alamos National Laboratory
Pennsylvania State Univ., University Park
Northeast Solite Corp.
- Journal
-
Concrete International,
Vol. 28,
No. 10,
39-45,
October 2006
- Keywords
-
curing
|
water
|
x-ray microtomography
|
mortar
|
cements
|
size distribution
|
cements
|
hydration
|
compressive strength
- Identifiers
- mixture proportions for the control and IC high-performance mortars; selected size distribution of LWA used in the experimental program; Lightweight Aggregate (LWA)
- 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.