In this study, the phenol-cresol-formaldehyde (PhCR-F) resin was synthesised from the phenolic fraction of coal tar resin and formaldehyde through polycondensation. The physico-mechanical properties of the asphalt concrete were subsequently characterised to examine its water saturation, coefficient of long-term water-resistance (after 15 and 30 days), and compressive strength (at 20°C and 50°C). The results revealed that the addition of PhCR-F markedly increased the adhesion index with the surface of granite aggregates and glass before and after heating the bitumen. Furthermore, the PhCR-F addition enhanced the bitumen softening point, long-term water resistance, and thermo-stability but decreased the water-saturation index along with the penetration and ductility of bitumen. In conclusion, the study findings revealed that the synthesised PhCR-F resin is a promising adhesion promoter in pavement grade oil bitumen for application with asphalt concrete.

在这项研究中，苯酚-甲酚-甲醛 (PhCR-F) 树脂是由煤焦油树脂的酚醛部分和甲醛通过缩聚反应合成的。随后对沥青混凝土的物理机械性能进行表征，以检查其含水饱和度、长期耐水系数（15 天和 30 天后）和抗压强度（20°C 和 50°C）。结果表明，PhCR-F的加入显着提高了沥青加热前后与花岗岩骨料和玻璃表面的附着力指数。此外，PhCR-F的添加提高了沥青的软化点、长期耐水性和热稳定性，但降低了水饱和指数以及沥青的渗透性和延展性。综上所述，