What is the difference between shrinkage-compensating cement and expansive cement?
Shrinkage-compensating cement is one kind of expansive cement. An expansive cement is one that, after setting, increases in volume as it cures. This property can be used either to induce a limited amount of tensile stress in the reinforcement or to compensate for subsequent drying shrinkage. When an expansive cement is designed primarily for use in compensating for drying shrinkage it is called a shrinkage-compensating cement. In practice, the expansion of this type of cement must be restrained to induce compressive stresses that offset tensile stresses which would otherwise be induced by drying shrinkage.