Curling of a fiber reinforced floor 1

[rogermcc]

Has anyone had curling problems with steel fiber reinforced floors? Floor is 300,000 sq. ft. concrete 4500 psi, 3/4" agg., 3" slump. 6" thick, saw cut at 15' o.c.
Dowels installed at c.j.'s, relied on aggrigate interlock at saw cuts.

 

[ronster]

Curling is not usually related to reinforcing (fiber or welded wire fabric), cracking is. Curling is from the top drying or loosing water faster than the bottom of the slab. This is usually the case when a vapor barrier is used on the bottom (keeps moisture from escaping from the bottom of the slab) along with improper curing of the slab under adverse conditions (such as low humidiy, high winds, and/or high temperatures). Dowels at the slab joints should keep the slab from curing however the slab reinforcement or lack of would have little or no effect on it.