Effect of air relative humidity on silica gel

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F14%3A43898723" target="_blank" >RIV/60461373:22310/14:43898723 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Effect of air relative humidity on silica gel

Popis výsledku v původním jazyce

Consolidants based on esters of silica acid (alkoxysilanes) have been widely used for the consolidation of decaying stone monuments. These consolidants are prepared via the sol-gel process. The silica gel toughens the stone and prolongs its lifetime. But a well-known problem of the gels is that they shrink and crack during their formation and ageing. In this study, we focused on the effect of air relative humidity on the gelation time and on the time to the appearance of the first crack. The whole set of experiments was undertaken at controlled laboratory conditions in a closed box. Five different humidities were kept constant by placing a saturated solution of salt in each box.

Název v anglickém jazyce

Effect of air relative humidity on silica gel

Popis výsledku anglicky

Consolidants based on esters of silica acid (alkoxysilanes) have been widely used for the consolidation of decaying stone monuments. These consolidants are prepared via the sol-gel process. The silica gel toughens the stone and prolongs its lifetime. But a well-known problem of the gels is that they shrink and crack during their formation and ageing. In this study, we focused on the effect of air relative humidity on the gelation time and on the time to the appearance of the first crack. The whole set of experiments was undertaken at controlled laboratory conditions in a closed box. Five different humidities were kept constant by placing a saturated solution of salt in each box.

Druh

O - Ostatní výsledky

CEP obor

AL - Umění, architektura, kulturní dědictví

OECD FORD obor

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Projekt

<a href="/cs/project/DF11P01OVV012" target="_blank" >DF11P01OVV012: Nové materiály a technologie pro konzervaci materiálů památkových objektů a preventivní památkovou péči</a><br>

Návaznosti

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

Rok uplatnění

2014

Kód důvěrnosti údajů

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