{HEAD ~ The asphalt} cross linking {TAIL ~ agent blend comprises} a second asphalt and at least one cross linking agent 
cross linking
{ HEAD ~ The asphalt } cross linking { TAIL ~ agent blend comprises } a second asphalt and at least one cross linking agent
HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH