Journal Published Online: 25 October 2019
Volume 8, Issue 1

The Influence of Curing Time on Restrained Shrinkage Cracking of Concrete with Shrinkage Reducing Admixture

CODEN: ACEMF9

Abstract

The positive effect of increased duration of curing in enhancing strength and durability of concrete is well established. However, there have been reports suggesting that longer curing times can result in increased drying shrinkage and can affect restrained shrinkage cracking. Although shrinkage reducing admixtures (SRAs) were introduced to the concrete industry about 25 years ago, the effect of curing time on their restrained shrinkage performance has not been previously investigated. In this study, the effects of three curing times of 1, 3, and 7 days on drying shrinkage performance of the control mix (mix without SRA) and the mix containing SRA were investigated. The results indicate that the restrained shrinkage cracking potential of the control mix increased with increased duration of curing. However, for the mix containing SRA, an opposite effect was observed and longer curing reduced both the free drying shrinkage and potential for restrained shrinkage cracking. The results also indicate that by increasing the curing time, the crack width for the control mix increased, whereas there was no significant effect on the crack width of the mix containing SRA.

Author Information

Bagheri, Alireza
Civil Engineering Department, K. N. Toosi University of Technology, Tehran, Iran
Jamali, Armin
Civil Engineering Department, K. N. Toosi University of Technology, Tehran, Iran
Pourmir, Mina
Civil Engineering Department, K. N. Toosi University of Technology, Tehran, Iran
Zanganeh, Hamed
Civil Engineering Department, K. N. Toosi University of Technology, Tehran, Iran
Pages: 15
Price: $25.00
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Details
Stock #: ACEM20190100
ISSN: 2379-1357
DOI: 10.1520/ACEM20190100