Bond performance between recycled concrete and steel bar after high temperature

Abstract: To investigate the influence of high temperatures on the bond performance of recycled concrete and steel bar, this article considers the influence of different concrete types (ordinary concrete and recycled concrete) and different temperatures (20, 100, 150, 200, 250, and 300°C) on the concrete compressive strength and the bond performance of concrete and steel bar. On this basis, the calculation formula of bond strength and bond slip between concrete and steel bar after the high temperature is established. The test results show that the concrete compressive strength presents a downward trend with the increase in temperature; the compressive strength loss of recycled concrete is higher than that of ordinary concrete; when the temperature reached 300°C, the compressive strength loss of ordinary concrete is 24.4%, while that of recycled concrete is 41.6%. The bond strength of pull-out specimens decreases with the increase of temperature, while the bond slip increases with the increase of temperature; the bond strength between recycled concrete and steel bar is lower than that between ordinary concrete and steel bar, while the bond slip between recycled concrete and steel bar is higher than that between ordinary concrete and steel bar. This article can provide a theoretical basis for the application of recycled concrete in high-temperature environment.

Standort
Deutsche Nationalbibliothek Frankfurt am Main
Umfang
Online-Ressource
Sprache
Englisch

Erschienen in
Bond performance between recycled concrete and steel bar after high temperature ; volume:12 ; number:1 ; year:2023 ; extent:8
Nonlinear engineering ; 12, Heft 1 (2023) (gesamt 8)

Urheber
Wang, Qihao
Wang, Ting
Zhou, Xiaoyu
Chen, Qunyu

DOI
10.1515/nleng-2022-0284
URN
urn:nbn:de:101:1-2023031713040173630087
Rechteinformation
Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
Letzte Aktualisierung
14.08.2025, 10:54 MESZ

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Beteiligte

  • Wang, Qihao
  • Wang, Ting
  • Zhou, Xiaoyu
  • Chen, Qunyu

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