It can get good effect through the measures of advancing the aggregate grading and increasing sand ratio and provide reference for similar engineering.

通过改善集料级配，适当增加砂率等措施来解决流沙问题能取得良好的效果，可为类似工程提供参考。

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The feasibility of using attle in ordinary concrete is studied. 50% sand replaced with attle, a dense-grading system is obtained with fly ash, sand, attle and stone.

研究了石屑用于普通混凝土的可行性及配合比设计方法。用石屑取代河砂50%，并通过粉煤灰、河砂、石屑和石子等混凝土各组成成分之间的相互填充来实现密级配。

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