Study of temperature effect on macro-synthetic fiber reinforced concretes by means of Barcelona tests: An approach focused on tunnels assessment
journal contributionposted on 20.03.2018 by Dimas A. Rambo, Ana Blanco-Alvarez, Antonio de Figueiredo, Edson R. dos Santos, Romildo D. Toledo Filho, Otavio Gomes
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This paper presents an experimental investigation on the applicability of the Barcelona (BCN) test to evaluate the mechanical properties of a macro-synthetic fiber reinforced concrete (MSFRC) submitted to high temperature environments (up to 600 °C). BCN tests demonstrated that the MSFRC gradually loses tensile strength an energy consumption density with increasing temperature. Temperatures of 400 °C and 570 °C shown to be critical to the MSFRC mechanical performance. The residual mechanical behavior of the macro-synthetic fibers was not affected by the temperature up to 100 °C. For higher temperatures, the reinforcement showed that may lose part of its crystallinity compromising the MSFRC post-cracking performance. The constitutive model used to determine the stress-strain curves of the MSFRC was capable to reproduce the composite behavior after the event of a fire.
This work was supported by the Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [Grant No. #2015/25457-9 (Dimas Alan Strauss Rambo)].
- Architecture, Building and Civil Engineering