Assessment of mechanical properties of high strength concrete (HSC) after exposure to high temperature
| Autor: | Ritoldas Šukys, Tomasz Drzymała, W. Jackiewicz-Rek, J. Gałaj |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Cement
Polypropylene Building construction Materials science Explosive material mechanical properties of HSC Strategy and Management 0211 other engineering and technologies 020101 civil engineering 02 engineering and technology high strength concrete Spall 0201 civil engineering high temperature chemistry.chemical_compound Compressive strength Flexural strength chemistry 021105 building & construction Ultimate tensile strength Composite material TH1-9745 Civil and Structural Engineering High strength concrete effect of high temperature |
| Zdroj: | Journal of Civil Engineering and Management, Vol 24, Iss 2 (2018) Journal of Civil Engineering and Management; Vol 24 No 2 (2018); 138-144 |
| ISSN: | 1822-3605 1392-3730 |
| Popis: | There has been a tendency to design ever slender building construction using high strength concrete in recent years. Application of HSC is also growing in tunnel construction. One of the most important challenges is to control explosive spalling of concrete and the method recommended by Eurocode 2 (EN 1992-1-2:2008/NA:2010P) is addition of polypropylene fibres to the mix. The purpose of the research described in this paper was to evaluate the changes of mechanical properties of HSC exposed to the effect of high temperature. The tests were carried out on three types of high strength concrete: air-entrained concrete, polypropylene fibre-reinforced concrete and reference concrete having constant water/cement ratio. The properties of hardened concrete including compressive strength, tensile splitting strength, flexural strength and E-modulus were studied. The latter tests were carried out on both on concrete cured at 20°C and concrete subjected to high-temperature conditions at 300°C, 450°C and 600°C. The results enabled us to evaluate the effect of high-temperature conditions on the properties of high-performance concrete and compare the effectiveness of the two methods designed to improve the high-temperature performance of the concrete: addition of polypropylene fibres and entrainment of air. |
| Databáze: | OpenAIRE |
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