iv) mixing the PMA blend for a period of time to allow a polymer network to form within {TAIL ~ the first and second asphalt}, wherein the mixing step is performed without {HEAD ~ substantial delay} following blending step iii) 
iv ) mixing the PMA blend for a period of time to allow a polymer network to form within { TAIL ~ the first and second asphalt } , wherein the mixing step is performed without { HEAD ~ substantial delay } following blending step iii )
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH