沥青路面耐久性的影响因素分析及其改进措施

影响沥青混凝土路面耐久性的主要因素是车辙、裂缝和半刚性基层的质量．道路交通量大、气温高、路面结构及材料组成配比不当等导致车辙的形成；裂缝因成因不同而分为疲劳裂缝、温度裂缝和反射裂缝，分别探讨了其影响因素；半刚性材料的强度和抗冲刷能力以及施工质量均会影响半刚性基层的质量．应从合理设计路面结构层次及混和料配合比，采取正确的施工方法和养护方法，选择抗冲刷性好、干缩系数和温缩系数小、抗拉强度高的半刚性材料，提高基层质量等来提高沥青路面的耐久性。

Analysis of influential factors of asphalt pavement durability and treatment measures for corresponding defects

Three major influential factors (track, crack and quality of semi-rigid base course) on the durability of asphalt pavement are analyzed. The leading factors for tracks are: road traffic and meteorological conditions, pavement structure and material composition. Fatigue crack, temperature crack and reflected crack are classified according to their causes and their influential factors discussed. The main factors on the quality of semi-rigid base course, strength of semi-rigid material, erosion resistance and construction quality are pointed out. Finally the prevention and treatment measures for corresponding defects are put forward in the paper, based on the domestic and international experiences: proper design of pavement structure and mixture ratio, proper construction and maintenance, choice of semi-rigid materials with good anti scour small coefficients of shrinkage and temperature and high tensile strength.