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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/GA17-14198S" target="_blank" >GA17-14198S: Kinetika tvorby mikrostruktury silikátů v závislosti na hydrotermálních podmínkách a typu vstupních surovin</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

ICAAC ‐ 6th International Conference on Autoclaved Aerated Concrete

ISBN

—

ISSN

2509-7075

e-ISSN

—

Počet stran výsledku

6

Strana od-do

439-444

Název nakladatele

Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co

Místo vydání

Berlin

Místo konání akce

Berlín

Datum konání akce

4. 9. 2018

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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