HEAT TREATMENT OF HIGHT PERFORMANCE CONCRETE TO REDUCE ITS SUSCEPTIBILITY TO EXPLOSIVE SPALLING

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F14%3APU110082" target="_blank" >RIV/00216305:26110/14:PU110082 - 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

HEAT TREATMENT OF HIGHT PERFORMANCE CONCRETE TO REDUCE ITS SUSCEPTIBILITY TO EXPLOSIVE SPALLING

Popis výsledku v původním jazyce

High performance concrete (HPC) is nowadays often used as buildings material for constructions with high level of complexity. The compressive strength of HPC is high because of its dense microstructure which has almost no capillary pores. If the HPC concrete is exposed to high temperatures, for example fire, there are no outlets for the entrapped water vapor. The surface layers of the elements are therefore very susceptible to explosive spalling. Due to the spalling reactions the constructions are loosing load bearing concrete cross sections and the reinforcement becomes directly exposed to the flames and softens. Thus, the elements may collapse earlier than with intact cover. This study deals with heat treatment of HPC as to enlarge pores and generatemicrocracks, which in case of fire may form a porous network for the liberation of the water vapor and avoid high vapor pressure, which could cause explosive spalling. In this study the specimens were heated with low rates up to maximum

Název v anglickém jazyce

HEAT TREATMENT OF HIGHT PERFORMANCE CONCRETE TO REDUCE ITS SUSCEPTIBILITY TO EXPLOSIVE SPALLING

Popis výsledku anglicky

High performance concrete (HPC) is nowadays often used as buildings material for constructions with high level of complexity. The compressive strength of HPC is high because of its dense microstructure which has almost no capillary pores. If the HPC concrete is exposed to high temperatures, for example fire, there are no outlets for the entrapped water vapor. The surface layers of the elements are therefore very susceptible to explosive spalling. Due to the spalling reactions the constructions are loosing load bearing concrete cross sections and the reinforcement becomes directly exposed to the flames and softens. Thus, the elements may collapse earlier than with intact cover. This study deals with heat treatment of HPC as to enlarge pores and generatemicrocracks, which in case of fire may form a porous network for the liberation of the water vapor and avoid high vapor pressure, which could cause explosive spalling. In this study the specimens were heated with low rates up to maximum

Druh

D - Stať ve sborníku

CEP obor

JN - Stavebnictví

OECD FORD obor

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Projekt

<a href="/cs/project/EE2.3.20.0111" target="_blank" >EE2.3.20.0111: SUPMAT - Podpora vzdělávání pracovníků center pokročilých stavebních materiálů</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

Název statě ve sborníku

Construmat 2014

ISBN

978-80-248-3381-1

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

43-49

Název nakladatele

VŠB

Místo vydání

Ostrava

Místo konání akce

Ostrava

Datum konání akce

11. 6. 2014

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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