Investigating the governing factors influencing the pozzolanic activity through a database approach for the development of sustainable cementitious materials

Journal article


Tural, H.G., Ozarisoy, B., Derogar, S. and Ince, C. (2023). Investigating the governing factors influencing the pozzolanic activity through a database approach for the development of sustainable cementitious materials. Construction and Building Materials. 411 (134253), pp. 1-18. https://doi.org/10.1016/j.conbuildmat.2023.134253
AuthorsTural, H.G., Ozarisoy, B., Derogar, S. and Ince, C.
Abstract

Pozzolans, known to possess high pozzolanic activity, enhances the long-term engineering properties of concrete due to the consumption of calcium hydroxide and the consequent formation of the calcium-silicate-hydrate gels within the cementitious matrix. Although the key factors that affect the pozzolanic activity such as the chemical composition, amorphousness, and fineness are commonly addressed in literature, there is a growing need to further gain an insight into the factors that govern this activity in a more comprehensive approach. The aim of this empirical study is to develop concrete models comprising optimal replacement of pozzolans based on the governing factors affecting the activity through the database approach. The database, consisting of 631 number of data points harvested from the literature, is established to determine the optimum replacement levels of the designated pozzolans in concrete. The governing factors therefore played a key role in establishing the boundary conditions that enabled the potential concrete models to be generated particularly for the sustainability assessment of concrete incorporating pozzolans. The study shows that the optimum replacement levels in con- crete mixtures are 15–50% for GGBS, 10–35% for fly ash, and 5–15% for silica fume. The study furthermore demonstrated that the utilisation of these substitutions leaded a considerable reduction in carbon emissions that ranged from 13% to 43% for GGBS, 9–31% for fly ash, and 4–13% for silica fume. The study significantly contributes to the generation of greener construction materials, and offers a cleaner disposal route for the pozzolans principally compared to the traditional waste management alternatives.

KeywordsMineralogy; Optimised models; Portland cement; Pozzolans; Sustainability
Year2023
JournalConstruction and Building Materials
Journal citation411 (134253), pp. 1-18
PublisherElsevier
ISSN1879-0526
Digital Object Identifier (DOI)https://doi.org/10.1016/j.conbuildmat.2023.134253
Web address (URL)https://www.sciencedirect.com/science/article/pii/S0950061823039715?via%3Dihub
Publication dates
Print12 Jan 2024
Publication process dates
Accepted17 Nov 2023
Deposited19 Dec 2023
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