concrete mix ratio test 混凝土配合比试验
In order to ensure engineering quality, the mix ratio test must be done strictly.
为了保证工程质量，必须进行严格的配合比试验。
Furthermore, the mix ratio of concrete and the size of coarse aggregation have also effect on the results of test, but it seems that the effect of the fine coarse aggregation is not evident.
此外，混凝土的配合比与粗集料对测试结果也有重要影响，而细集料的影响似乎并不明显。
Mechanism, Mix ratio design, workability evaluation and test method of high-dropping shake-free self-compacting concrete were put forward.
提出对高抛免振捣自密实混凝土的工作机理、配合比设计、工作性评价方法及相应的试验方法。
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