Concrete industrial ground floors - Aspects of crack control

Various aspects of crack control in concrete ground floors were discussed. To control cracks, the need is to develop mix designs that minimize drying shrinkage, which is a function of the water content, cement composition, aggregate type and size and relative humidity. It is also essential to minimize the risk that the slab top level and the sub-base top surface are both out of tolerance at the same point. The slab top level and the sub-base top surface should be in the adverse condition to reduce the slab thickness.