Investigation of Mechanical and Durability Properties of Alkali-Activated Concrete Prepared with Ternary Blended Ground Granulated Blast Furnace Slag, Fly Ash, and Jajrood Trass
Publication: Journal of Materials in Civil Engineering
Volume 35, Issue 7
Abstract
Alkali-activated concrete (AAC), an environment-friendly material, has attracted the attention of many researchers due to its unique features, such as good mechanical and durability properties. This research fabricated AACs that were a mixture of ground granulated blast furnace slag (GGBS), fly ash (FA), and Jajrood trass (JT) binders in three combinations with different molar ratios, namely 70%GGBS-20%FA-10%JT (), 80%GGBS-10%FA-10%JT (), and 70%GGBS-10%FA-20%JT (). Subsequently, the mechanical and durability properties and the microstructure of the AACs were investigated. The results indicated that the 28-day compressive strength of the samples increased from 73.4 to 79.9 MPa when the molar ratio decreased from 6.0 to 5.4. The same trend was observed for the tensile strength, water absorptivity, rapid chloride migration, corrosion resistance of rebars, pullout strength of rebars, and scaling resistance of concrete subjected to freeze–thaw cycles in the presence of deicers. Moreover, the 1-day corrosion of a steel rebar increased its pullout strength due to an increase in its surface roughness. However, an increase in corrosion time reduced the pullout strength due to cracking. Scanning electron microscopy images confirmed the results concerning the mechanical and durability properties of AAC.
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Data Availability Statement
The data sets generated during and/or analyzed during this study are available from the corresponding author upon reasonable request.
Acknowledgments
Author contributions: Mohsen Adabi designed the experiments. Amirreza Amani performed the experiments. Ehsan Darvishan wrote the manuscript. All authors have read and approved the final manuscript.
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© 2023 American Society of Civil Engineers.
History
Received: Jul 8, 2022
Accepted: Dec 9, 2022
Published online: Apr 29, 2023
Published in print: Jul 1, 2023
Discussion open until: Sep 29, 2023
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Cited by
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