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2022 | Vol. 22, no. 4 | art. no. e187, 2022
Tytuł artykułu

Effect of polymer fibers on pore pressure development and explosive spalling of ultra-high performance concrete at elevated temperature

Wybrane pełne teksty z tego czasopisma
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
This paper investigated pore pressure development of ultra-high performance concrete (UHPC) included various polymer fibers, i.e., linear low-density polyethylene (LLDPE), ultra-high molecular weight polyethylene (UHMWPE), polypropylene (PP), polyester (PET), and polyamide (PA) fibers. Temperature and pore pressure were measured simultaneously at different depths of UHPC specimens subjected to one-dimensional heating. It was found that the PP and PA fibers prevented spalling of UHPC by enhancing moisture migration, which resulted in the development of pore pressure in the deeper region of the specimens. The moisture migration in UHPC with LLDPE fibers caused spalling of a layer of concrete in a deep region of specimen. UHMWPE fibers did not affect pore pressure development and spalling resistance of UHPC significantly, while with PET fibers, the pore pressure of UHPC raised sharply due to inadequate moisture migration, leading to spalling of a whole layer. Instead of melting polymer fibers and empty channels left, microcracks created by the fibers were responsible for releasing vapor pressure and spalling prevention. Fibers with high thermal expansion between 100 and 200 °C are recommended for spalling prevention of UHPC.
Wydawca

Rocznik
Strony
art. no. e187, 2022
Opis fizyczny
Bibliogr. 41 poz., fot., rys., tab., wykr.
Twórcy
autor
  • College of Civil Engineering, Fuzhou University, Fuzhou 350108, China
autor
  • College of Civil Engineering, Fuzhou University, Fuzhou 350108, China
autor
  • Department of Building and Real Estate, The Hong Kong Polytechnic University, Hong Kong, China, yiwei.weng@polyu.edu.hk
autor
  • School of Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen, Shenzhen 518055, People’s Republic of China, liye@hit.edu.cn
Bibliografia
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Uwagi
PL
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
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Identyfikator YADDA
bwmeta1.element.baztech-09ee7aa4-3a6d-41fd-ab2e-bcda67cef426
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