Abstract
The long-term performance of concrete subjected to freezing and thawing damage is experimentally studied. The ASTM procedures for rapid freezing and thawing are followed to condition all the test samples. Dynamic modulus of elasticity and fracture energy for different numbers of freeze/thaw (F/T) cycles are measured through nondestructive modal and cohesive fracture tests, respectively. Nonlinear regression analysis is adopted to analyze the test data, and the relationship between the relative dynamic modulus and the number of F/T cycles is established. Based on the three-parameter Weibull distribution model, the probabilistic damage analysis is performed, from which the relationships between the number of F/T cycles and damage parameter for different probabilities of reliability are established. Based on the correlations between the available field environment and the indoor laboratory experiment, the field service-life of the considered structural concrete is predicted and validated with the fracture energy test data.
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