{HEAD ~ The mix} is poured over {TAIL ~ existing concrete}, wood, asphalt, etc. typically at anywhere from of an inch up to 2 inches thick 
is poured over
{ HEAD ~ The mix } is poured over { TAIL ~ existing concrete } , wood , asphalt , etc . typically at anywhere from of an inch up to 2 inches thick
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH