The slab next to the house foundation and stem walls was poured about 3 years ago during initial construction. I'm simply tying into the existing slab to extend the driveway out so nothing new being poured next to the foundation.
In that case, then there's no need to pin the joint. Theoretically there shouldn't be any vertical movement. If you do want to pin the joint, then smooth rods and sleeves are typically utilized so the slab is restrained in the vertical plane, but it's still allowed to expand laterally. Of course, expansion would only be an issue if you are pouring a large slab (don't recall how big you were looking to go). Done lots of 5" slabs with 3/4" dowels @ 12" o/c.
In that case, then there's no need to pin the joint. Theoretically there shouldn't be any vertical movement. If you do want to pin the joint, then smooth rods and sleeves are typically utilized so the slab is restrained in the vertical plane, but it's still allowed to expand laterally. Of course, expansion would only be an issue if you are pouring a large slab (don't recall how big you were looking to go). Done lots of 5" slabs with 3/4" dowels @ 12" o/c.