Increase In fineness

1. The rate of hydration increases . This leads to both a higher rate of strength gain and higher rate of evolution of heat .
2. Decrease the amount of bleeding , but the amount of water required for workability for non -air entrained concrete is increases , which results in increased drying shringkage result in surface cracking.
3. Reduce the durability of concrete to freeze-thraw cycles
4. Requires a greater amount of gymsum for proper set control , owing to the increased aailabitlity of C3S for reaction
5. Increase in production cost
6. Quality can easliy be detrimental when expose to air .
7. Increases in reaction with some aggregates = aggregates degradation