The rate of water evaporation, shrinkage strain and the areaof cracks increase with increasing exposure temperature and wind velocity, and with decreasing relative humidity.
混凝土的水蒸发速率、收缩变形、开裂面积都随着环境温度和风速的增加而增大，随着相对湿度的升高而降低；
2
According to the causes of crack occurrence and the weather characteristics in the project area, it is key to prevent the cracks such as the plastic crack, dry crack and cold shrinkage crack.
Thus, the judge should interpret the contract and the related provisions and confirm that the developing businessman bear the obligation of the shrinkage in area .