Permeability of High Performance Concrete With the Addition of Modified Polypropylene Fibers at Elevated Temperature

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Permeability of High Performance Concrete With the Addition of Modified Polypropylene Fibers at Elevated Temperature

Popis výsledku v původním jazyce

Increasing intensity of road and railway transport and thus a higher risk of accidents leads to the constant increase of safety standards in tunnels. Fire tests undertaken in past showed that increasing temperature leads to evaporation of chemically and physically bounded water and causes explosive spalling of dense high performance concrete (HPC) [1, 2]. New modified PP-fibers with melt flow index (MFI) 2500 provide required fire protection at highly reduced fiber dosage due to decrease of melt viscosity of fiber. Analysis of HPC with the addition of polypropylene fibers of different melt flow indexes and their mode of action is presented in the paper. This paper is focused on clarifying behaviour of concrete at elevated temperature with employing test set-up constructed at Institute of Building Construction and Technology, Vienna University of Technology. This test set-up allows measuring gas permeability of different building materials such as concrete, mortar or ceramic at both high temperature (up to 400°C) and pressure (up to 6 bars).

Název v anglickém jazyce

Permeability of High Performance Concrete With the Addition of Modified Polypropylene Fibers at Elevated Temperature

Popis výsledku anglicky

Increasing intensity of road and railway transport and thus a higher risk of accidents leads to the constant increase of safety standards in tunnels. Fire tests undertaken in past showed that increasing temperature leads to evaporation of chemically and physically bounded water and causes explosive spalling of dense high performance concrete (HPC) [1, 2]. New modified PP-fibers with melt flow index (MFI) 2500 provide required fire protection at highly reduced fiber dosage due to decrease of melt viscosity of fiber. Analysis of HPC with the addition of polypropylene fibers of different melt flow indexes and their mode of action is presented in the paper. This paper is focused on clarifying behaviour of concrete at elevated temperature with employing test set-up constructed at Institute of Building Construction and Technology, Vienna University of Technology. This test set-up allows measuring gas permeability of different building materials such as concrete, mortar or ceramic at both high temperature (up to 400°C) and pressure (up to 6 bars).

Druh

D - Stať ve sborníku

CEP obor

JN - Stavebnictví

OECD FORD obor

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Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název statě ve sborníku

EVENT MATERIALS

ISBN

978-3-900576-07-3

ISSN

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e-ISSN

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Počet stran výsledku

266

Strana od-do

84-91

Název nakladatele

Institut für Hochbau und Technologie

Místo vydání

Technische Universität Wien

Místo konání akce

Wien

Datum konání akce

19. 11. 2015

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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