论文部分内容阅读
以棱角状碎石和圆角状卵石(后者又分为球体和椭球体)为粗集料,测试了集料颗粒形状对骨架结构VCADRC的影响。结果证实,棱角状碎石的VCADRC明显大于圆角状卵石的VCADRC,圆角状卵石中又以椭球体颗粒的VCADRC大于球体颗粒的VCADRC。在此基础上,对SMA-20等3种典型配比的混合料分别采用马歇尔及SGC成型。通过混合料体积指标的测定及对比分析,发现相对于圆角状卵石而言,由棱角状碎石颗粒构成的混合料具有较大的VV、VMA、VCAmix,而且混合料的抗变形能力及稳定性均较优。
The effect of aggregated particle shape on the framework structure VCADRC was tested by using angular aggregates and rounded pebbles (the latter is divided into sphere and ellipsoid) as coarse aggregates. The results show that VCADRC of angular gravel is significantly larger than VCADRC of rounded corundum, and VCADRC of ellipsoidal particles in rounded corundum is larger than VCADRC of spherical particles. On this basis, Marshall and SGC were used to fabricate three kinds of typical mixes such as SMA-20 respectively. Through the measurement and comparative analysis of the volume index of the mixture, it is found that the mixture composed of the angular gravel particles has larger VV, VMA and VCAmix than the round cobblestone, and the anti-deformation ability and stability of the mixture Sex are better.