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, 14:33 by Dimas A. Rambo, Ana Blanco-AlvarezAna Blanco-Alvarez, Antonio de Figueiredo, Edson R. dos Santos, Romildo D. Toledo Filho, Otavio Gomes
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