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减少细粒含量、增大粗料含量和最大粒径是减少半刚性基层裂缝产生的有效措施之一;结合中国北方高寒地带(内蒙古大部和东北部分地区)的气候、经济和材料特点,提出采用大粒径砾石作为较低等级沥青路面的基层以降低其裂缝的产生。并通过与水泥稳定砾石、水泥稳定碎砾石的抗裂强度、抗折强度、温缩性能和干缩性能的对比研究,证明了该措施的可行性。
It is one of the effective measures to reduce the cracks in semi-rigid basement by reducing the content of fine particles, increasing the content of coarse particles and the maximum particle size. Combining with the climatic, economic and material characteristics of the alpine regions in northern China (most of Inner Mongolia and parts of northeast China) Large-size gravel is used as a base for lower grades of asphalt pavement to reduce the occurrence of cracks. And through the comparison with the cement stabilized gravel, cement stabilized gravel crack resistance, flexural strength, shrinkage and shrinkage properties, the feasibility of this measure is proved.