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Article

Influence of Heating–Cooling Regime on the Engineering Properties of Structural Concrete Subjected to Elevated Temperature

by
Daniel Paul Thanaraj
1,
Tattukolla Kiran
2,
Balamurali Kanagaraj
2,
Anand Nammalvar
2,*,
A. Diana Andrushia
3,
Beulah Gnana Ananthi Gurupatham
4 and
Krishanu Roy
5,*
1
Department of Civil Engineering, KMEA Engineering College, Kochi 682030, India
2
Department of Civil Engineering, Karunya Institute of Technology and Sciences, Coimbatore 641114, India
3
Department of ECE, Karunya Institute of Technology and Sciences, Coimbatore 641114, India
4
Division of Structural Engineering, College of Engineering Guindy Campus, Anna University, Chennai 600025, India
5
School of Engineering, The University of Waikato, Hamilton 3216, New Zealand
*
Authors to whom correspondence should be addressed.
Buildings 2023, 13(2), 295; https://doi.org/10.3390/buildings13020295
Submission received: 14 December 2022 / Revised: 10 January 2023 / Accepted: 13 January 2023 / Published: 19 January 2023
(This article belongs to the Section Building Structures)
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Abstract

Structural concrete has become a highly preferable building material in the construction industry due to its versatile characteristics, such as workability, strength, and durability. When concrete structures are exposed to fire, the mechanical properties of concrete degrade significantly. The research on the residual mechanical properties of concrete after exposure is necessary, particularly for the repair and rehabilitation of concrete elements and for the stability of the infrastructure. Factors, such as the grade of concrete, the effect of temperature exposure, and rapid water cooling, affect the residual strength characteristics of concrete. Considering these factors, the present investigation evaluates the mechanical properties of concrete using different grades, such as those ranging from 20 to 50 MPa, with an increment of 10 MPa. The specimens were exposed to different durations of fire from 15 to 240 min, following the standard rate of heating. A loss of strength was observed after fire exposure for all the grades of concrete. The rate of reduction in tensile and flexural strengths of the concrete was greater than that of compressive strength. The experimental results also showed that the strength reduction is greater for M50 than M20 concrete concerning the duration of heating. A microstructure evaluation confirmed the extent of damage to concrete under varied temperature conditions.
Keywords: concrete; elevated temperature; water cooling; stress–strain; residual strength concrete; elevated temperature; water cooling; stress–strain; residual strength

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MDPI and ACS Style

Paul Thanaraj, D.; Kiran, T.; Kanagaraj, B.; Nammalvar, A.; Andrushia, A.D.; Gurupatham, B.G.A.; Roy, K. Influence of Heating–Cooling Regime on the Engineering Properties of Structural Concrete Subjected to Elevated Temperature. Buildings 2023, 13, 295. https://doi.org/10.3390/buildings13020295

AMA Style

Paul Thanaraj D, Kiran T, Kanagaraj B, Nammalvar A, Andrushia AD, Gurupatham BGA, Roy K. Influence of Heating–Cooling Regime on the Engineering Properties of Structural Concrete Subjected to Elevated Temperature. Buildings. 2023; 13(2):295. https://doi.org/10.3390/buildings13020295

Chicago/Turabian Style

Paul Thanaraj, Daniel, Tattukolla Kiran, Balamurali Kanagaraj, Anand Nammalvar, A. Diana Andrushia, Beulah Gnana Ananthi Gurupatham, and Krishanu Roy. 2023. "Influence of Heating–Cooling Regime on the Engineering Properties of Structural Concrete Subjected to Elevated Temperature" Buildings 13, no. 2: 295. https://doi.org/10.3390/buildings13020295

APA Style

Paul Thanaraj, D., Kiran, T., Kanagaraj, B., Nammalvar, A., Andrushia, A. D., Gurupatham, B. G. A., & Roy, K. (2023). Influence of Heating–Cooling Regime on the Engineering Properties of Structural Concrete Subjected to Elevated Temperature. Buildings, 13(2), 295. https://doi.org/10.3390/buildings13020295

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