Infill slab
Infill slabs are simply poured between existing walls, so no formwork is required.
They require no external or internal stiffening beams and are typically used in garage floors where the walls are masonry.
The masonry wall and concrete slab must be separated from one another because they shrink or expand at different rates. If they are not separated the risk that the slab may develop unsightly cracks along the wall edge is increased.
A compressible filler strip, nominally 12 mm thick, is used as an impervious separation strip. Saw cuts may be required after 24 hours to control the shrinkage and cracking that is likely to occur.
Infill slab
Expansion joints in the surface of the concrete slab
Concrete slab joining with brick wall