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| Experiment of tensile constitutive characteristics of concrete after freeze-thaw cycles |
| College of Civil Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, China) |
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Abstract In order to obtain tensile stressstrain curve and formula of rising part for concrete after freeze-thaw cycles, samples with four strength grades were subjected to uniaxial tensile experiment after 0, 25, 75, 100 or 125 freeze-thaw cycle times. Based on normal tensile stress-strain relationship, tensile stressstrain constitutive relationship of concrete after freezethaw cycles was proposed. The results show that the slope of the rising part of tensile stressstrain curve falls down gradually and the peaks of tensile stress and strain decrease linearly as cycle times of freeze-thaw increase. Samples with high strength grade express less decrease of peak tensile stress and strain than those with low strength grade for the same freezethaw cycles, while decreasing rate has slight difference.
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2011, Vol. 32 
