Traditional hard-grade asphalts for high-modulus asphalt concrete (HMAC) are produced by using natural to modify matrix asphalts. However, scarce and expensive. To find a sustainable alternative, this study presented method synthesize phenol formaldehyde resin (PFR), hexamethylenetetramine (HMTA) Infrared radiation (IR) spectra analysis fraction the modifiers show that molecules can be cross-li...