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Crushed Stone Grading Standards

ASTM 57 Stone Specifications ... ASTM has created a numbering system to classify rocks and crushed stone based on its size. ASTM number 57 stone is large enough to allow drainage while supporting asphalt and cement. It is used in road beds, foundation beds and gravel walkways. ... ASTM No. 57 is a type of aggregate grading. The ASTM ...

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focus on sand and aggregate information. Focus on industry trends, focus on information value, and tap business opportunities in the era.