Curvature of precast reinforced concrete panels owing to shrinkage

The effect of concrete shrinkage on the exposed aggregate type of precast reinforced concrete panel where different mixes are used for the facing and the structural concretes. In long panels of this type, different concrete shrinkages can produce unacceptable curvatures. Some concrete shrinkage tests were carried out and a general analysis performed which allowed predicted and measure curvatures to be compared.