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介绍砂的级配及级配参数,通过天然砂与标准砂的级配对比,提出调整不符合砂的标准级配要求的天然砂的方法。
The grading and gradation parameters of sand are introduced. By comparing the grading of natural sand and standard sand, a method of adjusting the natural sand which does not meet the standard grading requirements of sand is proposed.