Mechanical and basic physical properties of high-strength concrete exposed to elevated temperatures

Kód výsledku v IS VaVaI

RIV/68407700:21110/18:00322445 - isvavai.cz

Výsledek na webu

http://dx.doi.org/10.4028/www.scientific.net/KEM.760.108

DOI - Digital Object Identifier

10.4028/www.scientific.net/KEM.760.108

Jazyk výsledku

angličtina

Název v původním jazyce

Mechanical and basic physical properties of high-strength concrete exposed to elevated temperatures

Popis výsledku v původním jazyce

In this paper, the effect of elevated temperatures on the mechanical and basic properties of two different newly-designed high-strength concretes is studied. The studied materials were prepared from Portland cement, steel fibers, reactive finely milled quartz powder and quartz sand, silica fume, plasticizer, and with a relatively low water/cement ratio of 0.24. The samples were stored in water environment for the first 28 days of hydration to achieve better mechanical properties. Then, after pre-drying at 105 °C to constant mass, the materials were exposed to elevated temperatures of 600 °C and 1000 °C where they were kept for 2 hours. The basic physical properties, such as matrix density, bulk density and open porosity were determined as a function of temperature. Mechanical properties (compressive and flexural strength) were also studied. The measured parameters exhibited a high dependence on temperature and the obtained results pointed to the structural changes of the studied materials. Spalling was not observed because of the pre-drying treatment.

Název v anglickém jazyce

Mechanical and basic physical properties of high-strength concrete exposed to elevated temperatures

Popis výsledku anglicky

In this paper, the effect of elevated temperatures on the mechanical and basic properties of two different newly-designed high-strength concretes is studied. The studied materials were prepared from Portland cement, steel fibers, reactive finely milled quartz powder and quartz sand, silica fume, plasticizer, and with a relatively low water/cement ratio of 0.24. The samples were stored in water environment for the first 28 days of hydration to achieve better mechanical properties. Then, after pre-drying at 105 °C to constant mass, the materials were exposed to elevated temperatures of 600 °C and 1000 °C where they were kept for 2 hours. The basic physical properties, such as matrix density, bulk density and open porosity were determined as a function of temperature. Mechanical properties (compressive and flexural strength) were also studied. The measured parameters exhibited a high dependence on temperature and the obtained results pointed to the structural changes of the studied materials. Spalling was not observed because of the pre-drying treatment.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

7AMB16PL044: Efektivní tepelná úprava kalů z čistíren odpadních vod a jejich aplikace ve směsném cementovém pojivu

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název statě ve sborníku

Special Concrete and Composites 2017

ISBN

978-3-0357-1240-7

ISSN

1013-9826

e-ISSN

1662-9795

Počet stran výsledku

6

Strana od-do

108-113

Název nakladatele

Transtech Publications

Místo vydání

Zürich

Místo konání akce

Skalský Dvůr

Datum konání akce

10. 10. 2017

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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