The period of time that the PMA blend is mixed should be sufficient to ensure an effective dispersion and subsequent integration of the cross linking agent and polymer to form a polymer network within {TAIL ~ the asphalt}, thus forming {HEAD ~ the PMA} 
The period of time that the PMA blend is mixed should be sufficient to ensure an effective dispersion and subsequent integration of the cross linking agent and polymer to form a polymer network within { TAIL ~ the asphalt } , thus forming { HEAD ~ the PMA }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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 OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD