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fineness modulus of quartz sand

Seven types of river sands (K 1 –K 7) were designed with a different fineness modulus. Sand gradations of river sands and standard sand (K s) were divided into three categories according to GB/T 14684-2011 , which were shown in Table 3. The fineness modulus was used to characterize the fineness and coarseness of the sand.

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