Internal hydrophobic treatment for mortar containing supplementary cementitious materials: thermal analysis of kinetics and products of hydration
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Date
2024-09-30
Authors
Materak, Kalina
Wieczorek, Alicja
Chałupka-Śpiewak, Karolina
Koniorczyk, Marcin
Kalina, Lukáš
Bílek, Vlastimil
0000-0001-8127-8175Advisor
Referee
Mark
Journal Title
Journal ISSN
Volume Title
Publisher
SPRINGER
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Abstract
The presented research investigates the application of the organosilicon admixtures based on triethoxyoctylsilane (OTES) on the hydration of the cement-based material with addition of supplementary cementitious materials (SCM) such as blast furnace slag and microsilica. The influence of silane-based admixtures on the kinetics of hydration was investigated by isothermal calorimetry. The calorimetric results disclosed that applied admixtures affect the hydration process of cement paste with SCM. The DTA/TG analysis provided the information about impact of triethoxyoctylsilane on the composition and formation of the mineral phases. The DTA/TG measurements showed noticeable changes in the thermal decomposition of the tested materials and amount of bounded water. The impact of OTES on the microstructure and pore size distribution of pastes was examined by mercury intrusion porosimetry. The result showed significant changes in the range of pore diameters. The influence of organosilicon admixtures on the compressive strength of mortars after 2, 7, 28, 56 and 90 days was also investigated. The effect depended on the mineral additive used. In case of blast furnace slag, the development of compressive strength was only delayed, however, in the case of microsilica, it was stopped.
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Citation
Journal of Thermal Analysis and Calorimetry. 2024, vol. 150, issue September, p. 937-951.
https://link.springer.com/article/10.1007/s10973-024-13637-z
https://link.springer.com/article/10.1007/s10973-024-13637-z
Document type
Peer-reviewed
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Published version
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Language of document
en