一、概述不仅在寒冷的北方,即便在有轻微冰冻的长江两岸,也存在着国产石蜡基沥青路面低温开裂较为严重的情况。国产沥青组成结构的特殊性使某些通用指标不相适应,例如脆点、虽然裂得较为严重但脆点却普遍较低。目前规范增加15℃延度指标是必要的。但是 First, an overview Not only in the cold north, even in slightly frozen the two sides of the Yangtze River, there are also domestic paraffin-based asphalt pavement cracking is more serious at low temperature. The particularity of domestic bitumen composition makes some common indicators unsuitable, such as brittle point, although the cracking is more serious but the brittle point is generally lower. The current specification to increase the delay of 15 ℃ index is necessary. but