Uniformly Loaded Slab on Grade
Uniformly Loaded Slab on Grade
(OP)
I came across a situation which seemed simple but apparantley I have no references on the proper way to do this. I have a slab on grade that needs to be designed for a 460psf uniform load. Im specifying 6" porous fill under on controlled fill or original soil. I will spec contraction joints 20' max. It is a small area. It is a pit for a prefab "pool treadmill". It will not be exposed or walked on so minor cracking is not a huge concern.
I need advice or references on thickness and reinforcement.
Thanks
I need advice or references on thickness and reinforcement.
Thanks






RE: Uniformly Loaded Slab on Grade
A loading of 460 psf on a dense, granular subgrade is not too bad, but on a compressible clay it could lead to continual settlement problems.
So, first find out from your geotechnical engineer the subsoil charactoristics and capacities, then design your slab.
Differential settlement under your pool treadmill could ruin your pool!
RE: Uniformly Loaded Slab on Grade
I ditto Jheidt's input regarding the reference.
RE: Uniformly Loaded Slab on Grade
Ken
RE: Uniformly Loaded Slab on Grade
jjeng2 - As always,be sure to cure the slab thoroughly (preferably wet curing to minimize curling).
RE: Uniformly Loaded Slab on Grade
RE: Uniformly Loaded Slab on Grade
First of all, if this were a cure, then each construction joint in a large floor slab would need a thickened edge. This would add a significant cost to floor construction.
Secondly, not all floors curl. From my experiance, floors that are wet cured and allowed to slowly loose their excess moisture, curl less. The key seems to be a more even drying of the slab through it's thickness. If a vapor barrier is used under the slab (which I am in favor of) the process takes longer, but it can be done. One thing that seems to help even out the rate of moisture loss is the use of a high solids curing agent on the floor slab.
RE: Uniformly Loaded Slab on Grade