Both tensile and compressive strengths of concrete increase with the decrease in temperature. With this in mind and considering that fracture energy is in direct correlation with the so-called mechanical properties, is it plausible to assume an increase in fracture energy at sub-zero temperatures and/or owing to the complexity of fracture energy and its dependence on a large number of parameters namely, aggregate type, curing temperature, it would be on the safe side to assume it equal to its value at normal temperatures? If so, what is the range so as not to provide unrealistic results under sub-zero conditions?
This study has observed that low temperatures improve the fracture properties of concrete. As the temperature decreases, the tensile strength and the fracture energy increase markedly, especially until –70°C. Below this temperature, these properties tend to increase slowly or remain constant. From 20 to –170°C, concrete shows a two-fold increase in tensile strength and a three-fold increase in fracture energy. there are a few other studies for concrete at cryogenic temperature. Example see this link:
file:///C:/Users/MONCEF/Downloads/8513-27004-1-PB.pdf
This study has observed that low temperatures improve the fracture properties of concrete. As the temperature decreases, the tensile strength and the fracture energy increase markedly, especially until –70°C. Below this temperature, these properties tend to increase slowly or remain constant. From 20 to –170°C, concrete shows a two-fold increase in tensile strength and a three-fold increase in fracture energy. there are a few other studies for concrete at cryogenic temperature. Example see this link:
file:///C:/Users/MONCEF/Downloads/8513-27004-1-PB.pdf
Moncef L. Nehdi
Dear Professor Nehdi,
Many thanks for your reply and your explanation.
Regarding the link you shared, it is a URL in your own PC. I would be really grateful if you shared it here.
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