Have you ever noticed that concrete slabs – your driveway ... Those lines are known as 'expansion joints.' They are there to let the concrete move a bit when the weather changes. Without room to ...

You don't need to power wash or otherwise scrub the surface, though many people combine expansion joint ... slab surface.

This is standard repair work for a bridge and slab joints of this age,” R.I. DOT says of $509,000 in work on “slab joints” as ...