Effect of Dune Sand on Drying Shrinkage Cracking of Fly Ash Concrete
Source abstract
Abstract
In this study, the drying shrinkage cracking characteristics of concrete containing 30% fly ash were investigated for various dune sand (DS) replacements and unit water contents. In the results of compressive strength, the mixture with a DS-to-fine aggregate (DS/FA) ratio of 10% showed the highest value, which was 17.6% higher than the lowest value. However, in the results of restrained drying shrinkage cracking, the mixtures with a DS/FA ratio of 20% showed the highest crack resistance, which was 24% higher than the lowest crack resistance. Therefore, it is necessary to consider DS replacement according to the required performance of concrete. The restraint effect factors of the aggregates were analyzed based on the relationship between the volume change of each aggregate and the change in the net time to cracking. The restraint effect factor of crushed sand was 0.71–0.98 and that of DS was 0.56–0.90 when that of the coarse aggregate (CA) was 1.
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Research context
OpenAlex topics: Concrete Properties and Behavior · Concrete and Cement Materials Research · Innovative concrete reinforcement materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Daewoo Institute of Construction Technology, DAEWOO E&C, Suwon 16297, Korea
Department of Building Construction, Korea Polytechnics, Gumi 39257, Korea
Department of Architectural Engineering, Chungnam National University, Daejeon 34134, Korea
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