INFLUENCE OF POROSITY OF BASALT AGGREGATES ON FIRE RESISTANCE AND FREEZE-THAW DURABILITY OF FIBRE REINFORCED CONCRETE

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

INFLUENCE OF POROSITY OF BASALT AGGREGATES ON FIRE RESISTANCE AND FREEZE-THAW DURABILITY OF FIBRE REINFORCED CONCRETE

Popis výsledku v původním jazyce

The amount of pores and their size are the key parameters for enhancing fire resistance and freeze-thaw durability of concrete. Air content in fresh concrete and subsequent air voids in hardened concrete can be modified by applied type of aggregates and also by type and amount of added fibres. The target is to define the optimal amount of pores, which are beneficial for escape of water vapour from concrete structure on event of fire, and still preserve concrete from penetration of liquid water with potential content of chemicals into the concrete structure. In this study, basalt aggregates from Iceland (water absorption approx. 5%) and from Czech Republic (water absorption less than 1%) were used for preparation of test specimens. Basalt is evaluated as one kind of mineral in terms of its chemical and mineral composition, but characteristics of basalt aggregates used for production of concrete vary owing to their porosity. As dispersed fibre reinforcement, polypropylene fibres (PP-fibres) and basalt f

Název v anglickém jazyce

INFLUENCE OF POROSITY OF BASALT AGGREGATES ON FIRE RESISTANCE AND FREEZE-THAW DURABILITY OF FIBRE REINFORCED CONCRETE

Popis výsledku anglicky

The amount of pores and their size are the key parameters for enhancing fire resistance and freeze-thaw durability of concrete. Air content in fresh concrete and subsequent air voids in hardened concrete can be modified by applied type of aggregates and also by type and amount of added fibres. The target is to define the optimal amount of pores, which are beneficial for escape of water vapour from concrete structure on event of fire, and still preserve concrete from penetration of liquid water with potential content of chemicals into the concrete structure. In this study, basalt aggregates from Iceland (water absorption approx. 5%) and from Czech Republic (water absorption less than 1%) were used for preparation of test specimens. Basalt is evaluated as one kind of mineral in terms of its chemical and mineral composition, but characteristics of basalt aggregates used for production of concrete vary owing to their porosity. As dispersed fibre reinforcement, polypropylene fibres (PP-fibres) and basalt f

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

20101 - Civil engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2017

Kód důvěrnosti údajů

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