According to the research on the bending strength of the concrete with machine-made sand with various mixing amounts, the slump constant, and working performance, the paper concludes the bending strength of the concrete increases as more mixing amounts of the machinemade sand are added, indicates the bending strength reaches the maximum when the mixing amount of the machine-sand is between 60% to 70%, and the slump constant also shows the rising tendency when the mixed ratio increases, and illustrates the mixing amount of the machine-made sand has little influence on the concrete working parameter, when the mixing amount of the machine-made sand is lower than 70%.%通过开展不同掺量的机制砂混凝土的抗弯强度、坍落度及工作性能等方面的研究,得出混凝土的抗折强度均随着机制砂掺量的增大而增大,当机制砂掺量在60%～70%时,抗弯拉强度达到最大值,坍落度均随着机制砂掺比的增加总体上也呈现上升趋势,机制砂掺量低于70%时,则机制砂掺量对混凝土工作性参数影响不大。
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