CAJ | 학술논문

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。
사용궤제사체대일정량적하사래제비관장혼응토，근거불동궤제사성능삼수대관장혼응토성능적영향규률，제출료괄합생산관장혼응토생산사용적기술삼수，병진행료리심시험。실험결과표명：당궤제사세도모수재3.5~4.0시혼응토공작성교호；궤제사중석분함량월고，혼응토수수량월고，도치강도편저，당궤제사석분함량소우5%시，대혼응토강도몰유태대적영향；궤제사중석분화학성분대혼응토성능야유흔대적영향，당CaO함량월고、SiO2함량월저시，대혼응토성능영향월소；궤제사가이개선혼응토집료적급배，대혼응토리심성능유명현적개선。
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.