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

• Autorzy: Zhang Dong , Chen Baochun , Wu Xiangguo , Weng Yiwei , Li Ye

Identyfikatory

DOI

10.1007/s43452-022-00520-7

• 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.

Słowa kluczowe

EN

explosive spalling; ultra-high performance concretes; fibers; pore pressure; elevated temperature

PL

odprysk eksplozyjny; beton o dużej wytrzymałości; włókno; ciśnienie porowe; podwyższona temperatura

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2022
• Tom: Vol. 22, no. 4
• Strony: art. no. e187, 2022
• Opis fizyczny: Bibliogr. 41 poz., fot., rys., tab., wykr.

Twórcy

autor

Zhang Dong

• College of Civil Engineering, Fuzhou University, Fuzhou 350108, China

autor

Chen Baochun

• College of Civil Engineering, Fuzhou University, Fuzhou 350108, China

autor

Wu Xiangguo

• College of Civil Engineering, Fuzhou University, Fuzhou 350108, China

autor

Weng Yiwei

• Department of Building and Real Estate, The Hong Kong Polytechnic University, Hong Kong, China

autor

Li Ye

• School of Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen, Shenzhen 518055, People’s Republic of China

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)