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利用间隙率U法和流动时间S法表征细集料棱角性,分析表明,两者具有明显的线性相关性,其回归系数可用于细集料棱角性的间隙率U与流动时间S指标间相互换算。通过SMA-13沥青混凝土路用性能试验,分析了细集料棱角性对SMA沥青混凝土性能的影响规律,建立了沥青混凝土性能与细集料棱角性表征指标的相关关系,结合沥青混凝土路用性能要求,提出了沥青混凝土路面细集料棱角性技术标准。结果表明,这可作为沥青混凝土路面施工技术规范的修订建议,以提高石料企业加工细集料的质量。
The angularity of fine aggregate was characterized by the method of void ratio U and flow time S, and the analysis showed that the two had obvious linear correlation. The regression coefficients could be used for the relationship between the angular rate U of the fine aggregate and the flow time S Conversion. Through the performance test of SMA-13 asphalt concrete, the influence law of fine aggregate angularity on the performance of SMA asphalt concrete was analyzed, and the correlation between the performance of asphalt concrete and the angular character of fine aggregate was established. Combined with the performance of asphalt concrete pavement, Requirements, put forward the asphalt concrete pavement fine aggregate angular technical standards. The results show that this can be used as a revision of asphalt pavement construction specifications, in order to improve the quality of fine aggregate processing enterprises.