A lot of people in the trades think its no problem to add water. Everytime water is added strength is diminished! This fact is especially damaging at power trowel stage. If water is added to early or to much spalling will occur . Alberta building code requires air entrainment to give freeze thaw cycle durability . When you combine air entrainment and extra water at site power troweling will cause spalling.
Cracking is normal . If you can get your finger nail in it or wider can be a sigh of excess water added at site. Hope this helps.
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