Abstract

Coefficient of thermal expansion of concrete is an essential part of cracking risk analysis. A formula for coefficient of thermal expansion based on the theory of poromechanics was derived. This formula utilizes ultrasonic pulse velocity measurements. To validate the formula, ultrasonic pulse velocity and free shrinkage of cement paste with water to cement ratio of 0.33 were measured starting from the casting. A good agreement was found between the calculated values and the data found in the literature. In addition, the calculated coefficient of thermal expansion was applied for decoupling of thermal and autogenous shrinkage of cement paste. Decoupled linear autogenous shrinkage was compared to the measured volumetric autogenous shrinkage.

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