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@article{2382944,
author = {Kalina, Lukas and Bilek, Vlastimil and Sedlacik, Martin and Caba, Vladislav and Smilek, Jiri and Svec, Jiri and Bartonickova, Eva and Rovnanik, Pavel and Fladr, Josef},
article_location = {BASEL},
article_number = {6},
doi = {http://dx.doi.org/10.3390/ma16062173},
keywords = {concrete densifier; lithium silicate; surface treatment; gelation process},
language = {eng},
issn = {1996-1944},
journal = {Energy Materials: Materials Science and Engineering for Energy Systems},
title = {Physico-Chemical Properties of Lithium Silicates Related to Their Utilization for Concrete Densifiers},
url = {https://www.mdpi.com/1996-1944/16/6/2173},
volume = {16},
year = {2023}
}
TY - JOUR
ID - 2382944
AU - Kalina, Lukas - Bilek, Vlastimil - Sedlacik, Martin - Caba, Vladislav - Smilek, Jiri - Svec, Jiri - Bartonickova, Eva - Rovnanik, Pavel - Fladr, Josef
PY - 2023
TI - Physico-Chemical Properties of Lithium Silicates Related to Their Utilization for Concrete Densifiers
JF - Energy Materials: Materials Science and Engineering for Energy Systems
VL - 16
IS - 6
SP - 1-10
EP - 1-10
PB - Taylor & Francis
SN - 19961944
KW - concrete densifier
KW - lithium silicate
KW - surface treatment
KW - gelation process
UR - https://www.mdpi.com/1996-1944/16/6/2173
N2 - Protection of concrete against aggressive influences from the surrounding environment becomes an important step to increase its durability. Today, alkali silicate solutions are advantageously used as pore-blocking treatments that increase the hardness and impermeability of the concrete's surface layer. Among these chemical substances, known as concrete densifiers, lithium silicate solutions are growing in popularity. In the present study, the chemical composition of the lithium silicate densifiers is put into context with the properties of the newly created insoluble inorganic gel responsible for the micro-filling effect. Fourier-transform infrared spectroscopy was used as a key method to describe the structure of the formed gel. In this context, the gelation process was studied through the evolution of viscoelastic properties over time using oscillatory measurements. It was found that the gelation process is fundamentally controlled by the molar ratio of SiO2 and Li2O in the densifier. The low SiO2 to Li2O ratio promotes the gelling process, resulting in a rapidly formed gel structure that affects macro characteristics, such as water permeability, directly related to the durability of treated concretes.
ER -
KALINA, Lukas, Vlastimil BILEK, Martin SEDLACIK, Vladislav CABA, Jiri SMILEK, Jiri SVEC, Eva BARTONICKOVA, Pavel ROVNANIK and Josef FLADR. Physico-Chemical Properties of Lithium Silicates Related to Their Utilization for Concrete Densifiers. \textit{Energy Materials: Materials Science and Engineering for Energy Systems}. BASEL: Taylor \&{} Francis, 2023, vol.~16, No~6, p.~1-10. ISSN~1996-1944. Available from: https://dx.doi.org/10.3390/ma16062173.
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