Monitoring the effect of quartz-sand replacement by amorphous-silica raw material on the microstructure of calcium silicate composites

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F20%3APU135068" target="_blank" >RIV/00216305:26110/20:PU135068 - isvavai.cz</a>
Result on the web
<a href="http://mit.imt.si/izvodi/mit201/hustatova.pdf" target="_blank" >http://mit.imt.si/izvodi/mit201/hustatova.pdf</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.17222/mit.2019.191" target="_blank" >10.17222/mit.2019.191</a>

Result language
angličtina
Original language name
Monitoring the effect of quartz-sand replacement by amorphous-silica raw material on the microstructure of calcium silicate composites
Original language description
Quartz sand is the main raw material for the production, of autoclaved calcium silicate composites. However, its resources are rapidly dwindling, and alternative siliceous raw materials need to be sought and tested for replacement. Most often they are raw materials containing amorphous silica. Amorphous silica is more readily soluble than crystalline silica, and thus may contribute to the formation of a superior microstructure of the calcium silicate composite through calcium hydrate phases. This paper is focused on determining the optimal replacement rate of amorphous silica raw material for crystalline silica sand, while describing changes in microstructure of calcium silicate composites. The replacement rate was graded to 0%, 25%, 50%, 75% and 100%. Hydrothermal treatment conditions are based on the real production of autoclaved aerated concrete, so a temperature of 190°C and an isothermal holding time of 7 hours was chosen. To study the effect of the ratio of raw materials on microstructure, X-ray diffraction analysis supported by scanning electron microscopy images was used.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
20101 - Civil engineering

Project
<a href="/en/project/GA17-14198S" target="_blank" >GA17-14198S: Kinetics of silicon micro-structure creation in dependence on hydrothermal conditions and type of used materials</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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