摘   要：使用机制砂替代一定量的河砂来制备管桩混凝土，根据不同机制砂性能参数对管桩混凝土性能的影响规律，提出了适合生产管桩混凝土生产使用的技术参数，并进行了离心试验。实验结果表明：当机制砂细度模数在3.5~4.0时混凝土工作性较好；机制砂中石粉含量越高，混凝土需水量越高，导致强度偏低，当机制砂石粉含量小于5%时，对混凝土强度没有太大的影响；机制砂中石粉化学成分对混凝土性能也有很大的影响，当CaO含量越高、SiO2含量越低时，对混凝土性能影响越小；机制砂可以改善混凝土集料的级配，对混凝土离心性能有明显的改善。

 Abstract: The concrete pile was prepared by using manufactured sand instead of the equivalent content of river sand to find out the influence of different performance parameters of manufactured sand on the pile concrete and ascertains performance parameters which are suitable for producing concrete pile. And for these purposes, the centrifuge test was done. The result show that: when the fineness modulus of manufactured sand is in 3.5~4.0, the workability of concrete is good; the higher the content of fine content is, the higher the concrete water demand will be, which will result in a lower strength of concrete. When the fine content is less than 5%, there is no significant influence on the performance of the concrete; chemical constituents of stone powder in manufactured sand also have a great influence on performance of the concrete. Higher CaO content and lower SiO2 content cannot influence concrete performances a lot. Because of the improvement of the aggregate gradation, the centrifugal operation of concrete is obviously better.