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Performance and microstructure analysis of high‑strength concrete incorporated with nanoparticles subjected to high temperatures and actual fires

Wybrane pełne teksty z tego czasopisma
Identyfikatory
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Currently, nanoparticles are used as admixtures to reduce the thermal deterioration of concrete after exposure to fire. How-ever, the influence of high temperature on high-strength concrete (HSC) containing silica fume and nanoparticles has not been investigated well. In this study, various HSC mixes incorporated with 1%, 2%, 3% and 4% nanosilica (NS) or 1% and 2% nanoferrite (NF) were prepared to produce HSC with high enduring strength after being subjected to high temperatures of up to 800 °C and actual fires. The specimens were assessed via scanning electron microscopy, compression and splitting tensile tests, modulus of elasticity test, and water permeability coefficient analysis. Results showed that using NS and NF percentages of up to 3% and 2%, respectively, in HSC improved the mechanical properties and water permeability coefficient at elevated temperatures. The compressive strength of the heated specimens with 3% NS was better than those with 2% NF at temperatures 200°C 800°C. With regard to the microstructure feature, the results confirmed that NS acted as an adequate filling material, which produced a condensed microstructure with extra compressed hydration outputs. This may be associated to higher pozzolanic reaction of NS with high distribution that formed additional calcium silicate hydrate gel. The specimens with 3% NS had no cracks until the temperature of 800°C, but their porosity increased slightly.
Rocznik
Strony
art. no. e85, 1--9
Opis fizyczny
Bibliogr. 44 poz., il., tab., wykr.
Twórcy
  • Department of Civil and Architecture Construction, Suez University, Suez, Egypt
autor
  • Department of Physics and Engineering Mathematics, Faculty of Engineering, Zagazig University, Zagazig, Egypt
  • Faculty of Engineering, Delta University for Science and Technology, Gamasa, Egypt
  • Department of Civil Engineering, Faculty of Engineering, Islamic University of Gaza, Gaza Strip, Palestin
  • Department of Civil Engineering, Higher Institute of Engineering and Technology in Kafr-Elsheikh, Egypt
Bibliografia
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Uwagi
1)* Powtórzona bibliografia: poz. 32 i poz. 34.
2) Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023)
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-eb0e8eb8-3249-47d1-baa6-3cdd670b078c
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