A New Evaluation and Test Method for Shrinkage-Crack of Concrete

This paper has introduced a new method on the evaluation and test for concrete shrinkage and crack. This method could measure the accurate internal tensile stress brought by dry shrinkage of concrete with restrictive condition. Especially it can evaluate the capability of compensation shrinkage concrete to resist to shrinkage power with flexibility restrict condition objectively. A concept of dry shrinkage crack probability (C) has been put forward by which the concrete dry shrinkage crack probability could be divided into three levels named as: C≥60%(high risk),40%≤C60%(medium risk)and C40%(low risk). Tests have showed that the self-stress produced inside the shrinkage compensating concrete could reduced the concrete dry shrinkage crack probability effectively.