酶解木质素改性沥青的制备及性能研究

Preparation and property of EHL modified asphalt

采用酶解木质素对沥青进行改性,研究了酶解木质素及脲醛改性酶解木质素对改性沥青各项性能的影响。结果表明:添加酶解木质素及脲醛改性酶解木质素后提高了沥青的高温性能,略降低了沥青的低温性能,改善了沥青的抗老化性能;脲醛改性酶解木质素大大提高了沥青与石料之间的黏附性;酶解木质素的最佳掺量为12%。

The influences of enzymatic hydrolysis lignin （EHL）and urea-formaldehyde modified EHL on properties of the modified asphalt were studied. The results showed that the EHL can improve the high temperature performance and aging resistance of asphalt, but the low temperature performance was reduced slightly. The urea-formaldehyde EHL can improve the adhesiveness of stone with asphalt,and the optimum content of EHL was 12%.