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细集料是沥青混合料中的重要组成部分,直接影响着沥青路面的性能。本文简要介绍了机制砂和石屑的生产过程,对比了机制砂、天然砂以及石屑各自的特点,举例说明了细集料质量较差可能会出现的特殊问题。针对石屑中砂当量参数进行相关试验,阐述石屑洁净程度对沥青路面性能的影响,并提出了提高石屑产生质量的控制措施。
Fine aggregate is an important part of asphalt mixture, which directly affects the performance of asphalt pavement. This paper gives a brief introduction of the production process of machine-made sand and stone chips, compares the features of the machine-made sand, natural sand and stone chip, and illustrates the special problems that may occur when the quality of the fine aggregate is poor. According to the correlation test of sand equivalent parameters in stone chips, the influence of the stone chip cleanliness on the performance of asphalt pavement is expounded, and the control measures to improve the quality of chip stone are put forward.