Numerical analysis of cracking in fiber reinforced lime renders

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F13%3A00217827" target="_blank" >RIV/68407700:21110/13:00217827 - 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

Numerical analysis of cracking in fiber reinforced lime renders

Popis výsledku v původním jazyce

Cracking behavior of lime mortar renders subjected to shrinkage is numerically investigated byFEM. The render materials selected for the study include ordinary lime mortar, lime mortar with increased tensile strength,two mortars with different natural fibers (goat hairs and pig bristles) and two mortars reinforced with different content of short PVA fibers (0.5% and 2% by volume). The analyses simulate the crack evolution and allow us to shed light on the mechanism of the render deterioration. The studyreveals that increasing the mortar?s tensile strength may not improve its durability, when it is subjected to volume changes. Even though the number of cracks decreases, the cracks exhibit wider opening displacements and higher stressing takes place onthe interface with the substrate, leading to delamination failure. A qualitatively better performance is observed with those fiber reinforced mortars, in which the fibers provide sufficient crack-bridging action. If the maximum cohesive t

Název v anglickém jazyce

Numerical analysis of cracking in fiber reinforced lime renders

Popis výsledku anglicky

Cracking behavior of lime mortar renders subjected to shrinkage is numerically investigated byFEM. The render materials selected for the study include ordinary lime mortar, lime mortar with increased tensile strength,two mortars with different natural fibers (goat hairs and pig bristles) and two mortars reinforced with different content of short PVA fibers (0.5% and 2% by volume). The analyses simulate the crack evolution and allow us to shed light on the mechanism of the render deterioration. The studyreveals that increasing the mortar?s tensile strength may not improve its durability, when it is subjected to volume changes. Even though the number of cracks decreases, the cracks exhibit wider opening displacements and higher stressing takes place onthe interface with the substrate, leading to delamination failure. A qualitatively better performance is observed with those fiber reinforced mortars, in which the fibers provide sufficient crack-bridging action. If the maximum cohesive t

Druh

O - Ostatní výsledky

CEP obor

JN - Stavebnictví

OECD FORD obor

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Projekt

<a href="/cs/project/DF11P01OVV008" target="_blank" >DF11P01OVV008: Vysokohodnotné a kompatibilní vápenné malty pro extrémní aplikaci při restaurování, opravách a preventivní údržbě architektonického dědictví</a><br>

Návaznosti

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

Rok uplatnění

2013

Kód důvěrnosti údajů

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