Author ORCID Identifier

0000-0002-1374-2594

Document Type

Article

Disciplines

Civil engineering

Publication Details

Shaji, N.; Holmes, N.; Tyrer, M. Early Age Assessment of a New Course of Irish Fly Ash as a Cement Replacement. Applied Sciences, 2024, 14, 4128.

doi:10.3390/app14104128

Abstract

This paper explores the potential of a new source of fly ash, deposited on the site of a coalfired power plant in Ireland dating from 1985 to 1995, as a cement replacement material. A series of X-ray diffraction (XRD) analyses on binder samples with cement replacement levels of 0, 10, 25 and 35% was undertaken to determine the fly ash’s mineralogical composition and to determine its suitability as a supplemental cementitious material (SCM). The XRD results reveal a unique mineral composition with promising characteristics for enhancing the strength and durability of concrete. The experimental results were used to calibrate a thermodynamic model to predict changing phase assemblage and hydration behaviour over time and per replacement level. Thermodynamic models have been shown to give credible predictions of the long-term performance of cements, including SCMs. The initial experimental results’ thermodynamic modelling demonstrates the feasibility of this fly ash source as a sustainable alternative to traditional cement, paving the way for more ecofriendly construction. Ash deposits dating from 1995 to 2005 and from 2005 to the present will be presented in subsequent publications.

DOI

https://doi.org/10.3390/app14104128

Funder

TU Dublin Business Partners Research Scholarship

Creative Commons License

Creative Commons Attribution 4.0 International License
This work is licensed under a Creative Commons Attribution 4.0 International License.

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