沥青混凝土中粗集料影响实验研究

基于粗集料在沥青混凝土中形成持力骨架，直接影响混凝土的承载能力，实验研究了粗集料组成及粒径对混凝土抗压和蠕变性能影响．参考标准级配中粗集料质量百分比，设计了含不同组成和粒径的粗集料试样（细集料含量相同），进行了不同温度下单轴压缩和蠕变实验，结果表明，沥青混凝土力学性能强烈依赖粗集料组成特性，并提出粗、细集料以2．36 m m为界限的划分依据．

Experimental Researches of Asphalt Concrete with the Effect of Coarse Aggregate

As a bearing skeleton of asphalt concrete ,coarse aggregate directly affects the concrete bear-ing capacity .The effect of the coarse aggregate composition and its particle size on compression and creep properties are studied by tests .Compared the coarse aggregate content quality percentage of the standard gradation ,the test samples are designed with the different coarse aggregate composition and particle size （with the same fine aggregate content） .The uniaxial compression and creep experiments are conducted under different test temperatures .The results show that the mechanical properties of asphalt concrete depends strongly on the coarse aggregate composition characteristics ,and 2 .36mm is a division boundary of the coarse and fine aggregate .The analysis results provide a theoretical basis for the structure and mixture ratio design of asphalt concrete .