Mechanical properties of concrete at high temperature—A review

Ma, Qianmin; Guo, Rongxin; Zhao, Zhiman; Lin, Zhiwei; He, Kecheng

doi:10.1016/j.conbuildmat.2015.05.131

Cited by 632 publications

(318 citation statements)

References 101 publications

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“…The loss ratio in compressive strength of concrete subjected to 500 and 600 °C reaches 7.5% and 19.8%, respectively. The results show a similar trend with the previous studies [14]. …”

Section: Uniaxial Compressive Testssupporting

confidence: 92%

“…There have been many studies aimed at understanding thermal behavior of concrete at high temperatures, and it was found that there is a reduction for mechanical properties in terms of strength and elastic modulus of concrete when it is exposed to high temperatures. The works are reviewed in the reference [14]. However, effect of thermal cycling on mechanical change of concrete characteristics, which is a major concern for TES system, is not involved in these studies.…”

Section: Concrete Materialsmentioning

confidence: 99%

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Testing of High Thermal Cycling Stability of Low Strength Concrete as a Thermal Energy Storage Material

Pan

Zhong

et al. 2016

Applied Sciences

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Abstract:Concrete has the potential to become a solution for thermal energy storage (TES) integrated in concentrating solar power (CSP) systems due to its good thermal and mechanical properties and low cost of material. In this study, a low strength concrete (C20) is tested at high temperatures up to 600 • C. Specimens are thermally cycled at temperatures in the range of 400-300 • C, 500-300 • C, and 600-300 • C, which TES can reach in operation. For comparison, specimens also cycled at temperature in the range of 400-25 • C (room temperature), 500-25 • C, and 600-25 • C. It is found from the test results that cracks are not observed on the surfaces of concrete specimens until the temperature is elevated up to 500 • C. There is mechanical deterioration of concrete after exposure to high temperature, especially to high thermal cycles. The residual compressive strength of concrete after 10 thermal cycles between 600 • C and 300 • C is about 58.3%, but the specimens remain stable without spalling, indicating possible use of low strength concrete as a TES material.

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“…The loss ratio in compressive strength of concrete subjected to 500 and 600 °C reaches 7.5% and 19.8%, respectively. The results show a similar trend with the previous studies [14]. …”

Section: Uniaxial Compressive Testssupporting

confidence: 92%

Section: Concrete Materialsmentioning

confidence: 99%

Testing of High Thermal Cycling Stability of Low Strength Concrete as a Thermal Energy Storage Material

Pan

Zhong

et al. 2016

Applied Sciences

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“…Fire is one of the most severe and representative risks to buildings and structures. A lot of attention has been paid to the mechanical properties of concrete at high temperature, or the residual properties of concrete after exposure to elevated temperatures . With the development of modern construction industry, it is necessary to develop a high strength, durable, sustainable construction materials.…”

Section: Introductionmentioning

confidence: 99%

Flexural behavior of fiber and nanoparticle reinforced concrete at high temperatures

2018

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Summary In this study, the flexural tests were conducted to investigate the effects of temperature, steel fiber, nano‐SiO2, and nano‐CaCO3 on flexural behavior of concrete at high temperatures. The load‐deflection curves of fiber and nanoparticle reinforced concrete (FNRC) were measured both at room and high temperatures. Test results show that the load‐deflection curves become flatter, and the flexural strength, peak deflection, and energy absorption capacity decrease seriously with the increase of temperature. Both steel fiber and nanoparticles could significantly improve the flexural behavior of the concrete at room and high temperatures. The energy absorption capacity of FNRC before the peak point increases with the increase of steel fiber volume fraction. The improvement of nano‐SiO2 on flexural strength of FNRC at high temperature is better than that at room temperature, but the enhancement on energy absorption capacity is reverse. Nano‐SiO2 is more effective than nano‐CaCO3 in improving flexural behavior of concrete both at room and high temperatures.

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“…The C-S-H decomposition starts at about 550 °C but became significant only above 600 °C. The decomposition rate increases dramatically with temperature above 600 °C and it is a main reason for the strength loss of concrete exposed to temperatures above 600 °C [12][13] The main products of the C-S-H decomposition are C 3 S and E-C 2 S (decomposes at about 650 °C). Significant loss of concrete durability, strength and other structural changes occur at temperatures higher than 600 °C [14].…”

Section: Introductionmentioning

confidence: 99%

High Temperature Exposure of HPC – Experimental Analysis of Residual Properties and Thermal Response

et al. 2016

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Abstract. The effect of high temperature exposure on properties of a newly designed High Performance Concrete (HPC) is studied in the paper. The HPC samples are exposed to the temperatures of 200, 400, 600, 800, and 1000°C respectively. Among the basic physical properties, bulk density, matrix density and total open porosity are measured. The mechanical resistivity against disruptive temperature action is characterised by compressive strength, flexural strength and dynamic modulus of elasticity. To study the chemical and physical processes in HPC during its hightemperature exposure, Simultaneous Thermal Analysis (STA) is performed. Linear thermal expansion coefficient is determined as function of temperature using thermodilatometry (TDA). In order to describe the changes in microstructure of HPC induced by high temperature loading, MIP measurement of pore size distribution is done. Increase of the total open porosity and connected decrease of the mechanical parameters for temperatures higher than 200 °C were identified.

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Mechanical properties of concrete at high temperature—A review

Cited by 632 publications

References 101 publications

Testing of High Thermal Cycling Stability of Low Strength Concrete as a Thermal Energy Storage Material

Testing of High Thermal Cycling Stability of Low Strength Concrete as a Thermal Energy Storage Material

Flexural behavior of fiber and nanoparticle reinforced concrete at high temperatures

High Temperature Exposure of HPC – Experimental Analysis of Residual Properties and Thermal Response

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