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Title
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Effects of temperature on stress-strain curve of lightweight concrete
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Type
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Presentation
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Keywords
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Keywords: light weight concrete, temperature effect, residual compressive strength, stress-strain curve, elastic modulus
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Abstract
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Abstract This research evaluates the effects of temperature on mechanical properties of light and normal weight concrete in high temperature. 28 day compressive strength of normal weight concrete (NWC) and light weight concrete (LWC) samples was obtained 40 and 35Mpa respectively. All concrete specimens were 15*30 cm standard cylinders which exposed to head (100-200-400-600-800) °C were evaluated in laboratory temperature after cooling. The results indicate that both types of concrete exhibit low level of residual compressive strength with increasing temperature and this lowering degree for normal concrete is less compared to lightweight concrete. At testing temperature of 800°C, the percentage of strength decrease for lightweight concrete is 42.65 percent and for normal concrete 45.56 percent . After obtaining the stress – strain curves at different temperatures and by evaluating elastic modulus, it can be seen that strain increases with increase of temperature while the residual compressive strength and modulus of elasticity decrease.
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Researchers
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Mohammad Esmaeilnia omran (First Researcher), Tahmineh Yary Galeh (Second Researcher)
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