2014 Volume 70 Issue 4 Pages 428-440
The relationship between temperature during curing and the ultimate drying shrinkage of concrete is shown in this paper. The concrete temperature used even in prestressed concrete member tends to increase because the strength of concrete becomes higher and the thickness of member also becomes larger as the span of bridges are getting longer. The effect of temperature due to hydration on concrete drying shrinkage strain is examined in this paper by using the concrete member with the size of actual structure. It is clarified that the ultimate drying shrinkage strain of concrete becomes smaller when the concrete temperature during curing is high. The constitutive equation which expresses the relationship between ultimate drying shrinkage of concrete and constant temperature during curing is proposed. Furthermore, the hardening rule which is used for calculation of ultimate drying shrinkage strain under various temperature history is also proposed in this paper.
