沥青混凝土路面中的沥青在空气、日光、水分和冷热交替等自然因素的作用下,其物理和化学性质会不断发生变化,主要表现为变硬、变脆,与集料的粘接性能变差,导致路面产生裂缝、松散麻面等病害,路用性能也随之衰弱。通常,将这种沥青性质的变化称之为“老化”。沥青是由多种化学结构极其复杂的化合物组成的混合物,研究其老化过程有 Bitumen in asphalt concrete pavement will change its physical and chemical properties under the action of natural factors such as air, sunlight, moisture and alternating hot and cold, etc. The asphalt mainly changes into hard and brittle, Poor, resulting in cracks in the road, loose ma side and other diseases, road performance will also be weak. Often, this change in the nature of bitumen is called “aging.” Asphalt is composed of a variety of highly complex chemical compounds composed of a mixture of aging process to study it