What to do for construction joints in a 6" foundation mat?
What to do for construction joints in a 6" foundation mat?
(OP)
I am designing a build roughly 70'x 90'in plan with a 17.6'x 18' column grid with a perimeter concrete wall. It is basically a flexible mat foundation, so, control joints with cuts are not possible due to the continuos reinforcement needed in the slab.
There are thickened integral column footings which are 6'x6' and a thickened perimeter band below the wall. The slab is to be used as the floor surface. The structure is partially underground.
So, how do I deal with the construction joins and pour sequence to minimize cracks? Thanks.
There are thickened integral column footings which are 6'x6' and a thickened perimeter band below the wall. The slab is to be used as the floor surface. The structure is partially underground.
So, how do I deal with the construction joins and pour sequence to minimize cracks? Thanks.






RE: What to do for construction joints in a 6" foundation mat?
As far as construction joint, as long as the reinforcement continues through (doesn't occur at a lap), probably nothing special is required. You could tell them to use a bonding adhesive to make sure the cured and new pours bond.......or have them roughen the surface is shear development is a concern. If it were a 'spanning' slab you would have them locate the Construction joint in specific locations, but since this is continually supported on soils, shouldn't be an issue (unless you want them to keep away from column footings, or other supported loads)
Other thoughts: is there a vapor barrier below? Or is a waterstop necessary at this Construction Joint?
RE: What to do for construction joints in a 6" foundation mat?
RE: What to do for construction joints in a 6" foundation mat?
RE: What to do for construction joints in a 6" foundation mat?