Abstract
Calcium aluminate cement (CAC) is an alternative to Portland cement, valued for its superior early strength and thermal resistance. Partially replacing CAC with Fly ash (FA) can reduce carbon footprint and production costs of CAC, producing sustainable cementitious binders. This research investigates on various properties (i.e., hydration kinetics; phase assemblage evolution; compressive strength) of [CAC + FA] binders. Using 13 distinct FAs, up to 50% of CAC was substituted. The study measures hydration kinetics, compressive strength, and employs the number of constraints to estimate FA reactivity. Advanced quantitative analysis draws links between hydration kinetics and compressive strength and elucidate the role of FA (including composition and reactivity) on binder performance. Techniques such as X-ray diffraction and thermodynamic modeling illuminate phase compositions in [CAC + FA]. This study also develops a novel method that evaluates the degree of reaction of FA in non-Portland cement binders. Then the correlation between degree of reaction of FAs at 3 days number of constraints is revealed.
Recommended Citation
S. A. Ponduru et al., "Understanding Roles And Evaluating Reactivity Of Fly Ashes In Calcium Aluminate Binders," Construction and Building Materials, vol. 414, article no. 135062, Elsevier, Feb 2024.
The definitive version is available at https://doi.org/10.1016/j.conbuildmat.2024.135062
Department(s)
Electrical and Computer Engineering
Second Department
Materials Science and Engineering
Keywords and Phrases
Calcium aluminate cement; Compressive strength; Fly ash; Hydration kinetics; Reactivity
International Standard Serial Number (ISSN)
0950-0618
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 Elsevier, All rights reserved.
Publication Date
02 Feb 2024
Comments
National Science Foundation, Grant 1932690