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Article

Influence of Cooling Methods on the Residual Mechanical Behavior of Fire-Exposed Concrete: An Experimental Study

1
Postgraduate Program in Materials Engineering, Federal University of Ouro Preto, Ouro Preto 35400-000, Brazil
2
Federal Institute of Education, Science and Technology of Minas Gerais, Ipatinga 35164-261, Brazil
3
Department of Materials Engineering, Federal Centre of Technological Education of Minas Gerais, Belo Horizonte 30421-169, Brazil
4
Department of Transports Engineering, Federal Centre of Technological Education of Minas Gerais, Belo Horizonte 30421-169, Brazil
*
Authors to whom correspondence should be addressed.
Materials 2019, 12(21), 3512; https://doi.org/10.3390/ma12213512
Received: 25 September 2019 / Revised: 19 October 2019 / Accepted: 22 October 2019 / Published: 26 October 2019
(This article belongs to the Collection Concrete and Construction Materials)
This work reports the main conclusions of a study on the mechanical behavior of concrete under ISO 834 fire with different cooling methods. The aim of this research was to provide reliable data for the analysis of structures damaged by fire. The experimental program used cylindrical concrete test specimens subjected to ISO 834 heating in a furnace up to maximum gas temperatures of 400, 500, 600, 700, and 800 °C. The compressive strength was measured in three situations: (a) at the different temperature levels reached in the furnace; (b) after a natural cooling process; and (c) after aspersion with water at ambient temperature. The results indicate that the concrete residual compressive strength is fairly dependent on the maximum temperature reached in the furnace and revealed that concrete of a lower strength preserved relatively higher levels of strength. The cooling method significantly influenced the strength, albeit at a lower intensity. In all cases, the residual strength remained in the range of 38% to 67% of the strength at ambient temperature. The statistical analysis showed that the data obtained by the experimental program are significant and confirmed the influence of the conditions imposed on the residual strength. View Full-Text
Keywords: concrete fire degradation; residual mechanical behavior; cooling method concrete fire degradation; residual mechanical behavior; cooling method
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MDPI and ACS Style

Carvalho, E.F.T.d.; Silva Neto, J.T.d.; Soares Junior, P.R.R.; Maciel, P.d.S.; Fransozo, H.L.; Bezerra, A.C.d.S.; Gouveia, A.M.C.d. Influence of Cooling Methods on the Residual Mechanical Behavior of Fire-Exposed Concrete: An Experimental Study. Materials 2019, 12, 3512. https://doi.org/10.3390/ma12213512

AMA Style

Carvalho EFTd, Silva Neto JTd, Soares Junior PRR, Maciel PdS, Fransozo HL, Bezerra ACdS, Gouveia AMCd. Influence of Cooling Methods on the Residual Mechanical Behavior of Fire-Exposed Concrete: An Experimental Study. Materials. 2019; 12(21):3512. https://doi.org/10.3390/ma12213512

Chicago/Turabian Style

Carvalho, Espedito F.T.d., João T.d. Silva Neto, Paulo R.R. Soares Junior, Priscila d.S. Maciel, Helder L. Fransozo, Augusto C.d.S. Bezerra, and Antônio M.C.d. Gouveia. 2019. "Influence of Cooling Methods on the Residual Mechanical Behavior of Fire-Exposed Concrete: An Experimental Study" Materials 12, no. 21: 3512. https://doi.org/10.3390/ma12213512

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