For the most part, aggregates and water that are satisfactory for use with regular portland cement concretes can also be used with shrinkage-compensating concretes. The exception to this rule is when either contains sulfates or chlorides. If either one contains significant amounts of sulfate, ettringite will form even more readily than expected thus increasing the rate and amount of expansion in the concrete. This can be seen in aggregates that contain gypsum. Conversely, if either one contains high levels of chlorides, drying shrinkage will be increased and expansion will be reduced or not occur at all. This can be seen in most beach sands. It should also be noted that stronger and or more angular aggregates are more resistant to drying shrinkage.