Durability of Class C Fly Ash-Based Alkali Activated Concrete

Abstract

The durability of alkali activated concrete (AAC) synthesized using high calcium fly ashes (FAs) was studied. Surface resistivity, bulk electrical resistivity, rapid chloride ions penetration, and freeze-thaw resistance tests were carried out on AAC made with five different FAs. The specimens were either oven-or moist-cured. The effect of adding air entraining admixture (AEA) and recycled crumb rubber to the AAC specimens on the freeze-thaw resistance was investigated as well. It was found that the durability of AAC was higher than that of comparable ordinary Portland cement (OPC) concrete. Adding the AEA improved the freeze-thaw resistance but not enough to complete the 300 cycles, per ASTM C666-15. Adding the rubber to the AAC mixtures improved the freeze-thaw resistance significantly.

Department(s)

Civil, Architectural and Environmental Engineering

Comments

Ameren Corporation, Grant None

Keywords and Phrases

Alkali activated concrete; Ambient curing; Class C fly ash; Compressive strength; Crumb rubber; Durability; Fresh properties; Oven curing; Slag

International Standard Book Number (ISBN)

978-164195077-0

International Standard Serial Number (ISSN)

0193-2527

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2024 American Concrete Institute, All rights reserved.

Publication Date

09 Oct 2019

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