Alzaza, A., Ohenoja, K., & Illikainen, M. (2022). Improved strength development and frost resistance of Portland cement ground-granulated blast furnace slag binary binder cured at 0 °C with the addition of calcium silicate hydrate seeds. Journal of Building Engineering, 48, 103904. https://doi.org/10.1016/j.jobe.2021.103904
Improved strength development and frost resistance of Portland cement ground-granulated blast furnace slag binary binder cured at 0 °C with the addition of calcium silicate hydrate seeds
|Author:||Alzaza, Ahmad1; Ohenoja, Katja1; Illikainen, Mirja1|
1Fibre and Particle Engineering Research Unit, Faculty of Technology, University of Oulu, P.O. Box 4300, 90014, Oulu, Finland
|Online Access:||PDF Full Text (PDF, 5.6 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2022051034209
|Publish Date:|| 2022-06-22
Low ambient temperatures drastically decelerate the strength development of cementitious materials, which shortens the construction season in cold regions. The use of ground-granulated blast furnace slag (GGBFS) in concreting works is usually avoided in winter because of its slower hydration rate relative to Portland cement (PC). In this study, the impacts of calcium silicate hydrate (C-S-H) seeds on the strength development and reaction rate of PC/GGBFS binders cured at 0 °C were investigated. The results showed that the addition of C-S-H seeds can efficiently compensate for the strength loss caused by replacing PC with GGBFS, and this effect is more obvious at a lower GGBFS content (30%) than at a high content (50%). Better frost resistance was gained in the seeded binder containing 30% GGBFS than in the pure PC binder. The enhanced compressive strength and frost resistance in the seeded binary binder were attributed to the accelerated PC reaction rate, enhanced pozzolanic reaction rate and degree of GGBFS, and increased amount of pore-filling hydration products due to the nucleation effect of the C-S-H seeds.
Journal of building engineering
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
216 Materials engineering
This work was carried out under the auspices of the ARCTIC-ecocrete project, which is supported by the Interreg Nord program. This program is funded by the European Regional Development Fund and the Regional Council of Lapland.
© 2021 The Authors. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).