Influence of secondary raw materials on synthesisof tobermorite in lime–silicate composite

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F18%3APU128802" target="_blank" >RIV/00216305:26110/18:PU128802 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1002/cepa.842" target="_blank" >https://doi.org/10.1002/cepa.842</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/cepa.842" target="_blank" >10.1002/cepa.842</a>

Result language
angličtina
Original language name
Influence of secondary raw materials on synthesisof tobermorite in lime–silicate composite
Original language description
Crystalline calcium silicate hydrate (CSH) phases, primarily tobermorite, arise in the microstruc-ture of autoclaved aerated concretes (AACs) during autoclaving, which affects the concrete'simportant characteristics. Calcium oxide/hydroxide and silicon oxide are the feedstocks for thehydrothermal reactions. When producing AACs, aside from commonly used raw materials, it isalso possible to utilize secondary raw materials rich in silicon oxide. The use of such secondaryraw materials provides the opportunity for the construction industry to lower its impact on theenvironment. This work describes the investigation of individual added secondary raw materials’influence on the microstructure of AAC. The tested materials were as follows: high-temperaturefly ash, FBC ash, slag, ground container glass, and zeolite. The materials were mixed with quick-lime at a molar ratio of calcium oxide to silicon oxide of 0.73 and 1.0. Autoclave reactors were usedfor the synthesis of tobermorite under laboratory conditions. Autoclaving took place at 170 and190◦C with hydrothermal soaking times of 4, 8, and 16 h. The additive with the most significantimpact on microstructure was fly ash, while ground container glass showed the greatest influenceon mechanical characteristics.
Czech name
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Czech description
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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
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
ICAAC ‐ 6th International Conference on Autoclaved Aerated Concrete
ISBN
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ISSN
2509-7075
e-ISSN
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Number of pages
6
Pages from-to
439-444
Publisher name
Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co
Place of publication
Berlin
Event location
Berlín
Event date
Sep 4, 2018
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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