New synthetic glass-based supplementary cementitious materials derived from basalt composition
Alzeer, Mohammad I. M.; Cheeseman, Christopher; Kinnunen, Päivö (2021-11-18)
Mohammad I.M. Alzeer, Christopher Cheeseman, Paivo Kinnunen, New synthetic glass-based supplementary cementitious materials derived from basalt composition, Journal of Building Engineering, Volume 46, 2022, 103699, ISSN 2352-7102, https://doi.org/10.1016/j.jobe.2021.103699
© 2021 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
https://creativecommons.org/licenses/by/4.0/
https://urn.fi/URN:NBN:fi-fe2022041128024
Tiivistelmä
Abstract
The cement industry faces an increasing demand for new supplementary cementitious materials (SCMs) as alternative to slags and ashes, the sources of which are in continuous depletion. This study reports on the characteristics of synthetic aluminosilicate glasses derived from basalt composition (BGs) as new SCMs. The pozzolanic activity of the developed glasses as well as their influence on the hydration kinetics, microstructure, and mechanical properties of blended cements are reported. The obtained results show that pastes containing BGs demonstrated faster hydration rate and higher compressive strength compared to those containing commonly applied granulated blast furnace slag (GBFS). In addition, the developed glasses demonstrated higher pozzolanic activity than GBFS as demonstrated form the measured amount of portlandite and strength activity index. The developed glasses can be obtained from earth abundant carbon-free raw materials as it is similar in composition to basalt. Therefore, this novel approach has potential to provide low-carbon cementitious binders for the concrete industry.
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