Title:
Water Transport of Lightweight Concrete with Different Aggregate Saturation Levels
Author(s):
Ali Mardani-Aghabaglou, Erhan Yog? urtcu, and Özge Andiç-Çakir
Publication:
Materials Journal
Volume:
112
Issue:
5
Appears on pages(s):
681-692
Keywords:
drying shrinkage; freezing-and-thawing resistance; lightweight aggregate concrete; transport properties
DOI:
10.14359/51687768
Date:
9/1/2015
Abstract:
This study evaluates the effect of saturation degree of two different lightweight aggregate types with different water absorption characteristics compared to a limestone aggregate in a constant water-cement ratio (w/c) concrete mixture. Water transport properties such as water absorption, water sorptivity, aggregate-based drying shrinkage, and freezing-and-thawing resistance of the mixtures were investigated. Finally, SEM analysis was performed to evaluate the interfacial transition zone characteristics of these concrete mixtures in light of said findings. The test results indicated that the transport properties and freezing-and-thawing resistance of the concrete mixtures were improved at early ages and the total concrete drying-shrinkage was decreased by increasing saturation level of aggregate. However, aggregate moisture content does not have a significant effect on the compressive strength of the concrete mixtures.
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