more - Minimum Concrete Cover Tolerance
more - Minimum Concrete Cover Tolerance
(OP)
Am inspecting on a job where the elevated slabs are 3' thick with #6@6 bot. short-way, #6@12 bot. long-way, #6@12 top long-way and #8@6 top short-way.
top mat cover reqd. = 3/4"
With the tolerance in reduction in cover can be 1/2".
In the completed slabs, LOTS surface cracks in the short-way direction, spaced curiously at multiples of 6".
Is the full 3/4" of concrete cover enough to provide sufficient aggregate interlock over that big of a bar to prevent these cracks? Or am I just barking up the wrong tree altogether?
top mat cover reqd. = 3/4"
With the tolerance in reduction in cover can be 1/2".
In the completed slabs, LOTS surface cracks in the short-way direction, spaced curiously at multiples of 6".
Is the full 3/4" of concrete cover enough to provide sufficient aggregate interlock over that big of a bar to prevent these cracks? Or am I just barking up the wrong tree altogether?






RE: more - Minimum Concrete Cover Tolerance
RE: more - Minimum Concrete Cover Tolerance
If the mix design was for No. 57 stone, with 3/4" cover, that could cause aggregate segregation and the cracking you noted.
RE: more - Minimum Concrete Cover Tolerance
RE: more - Minimum Concrete Cover Tolerance
BA
RE: more - Minimum Concrete Cover Tolerance
Possible formwork issue?
RE: more - Minimum Concrete Cover Tolerance