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See Chinese contents: JGJ 52-2006 JGJ 52-2006: Standard for technical requirements and test method of sand and crushed stone (or gravel) for ordinary concrete
This Standard is established to utilize nature sand, artificial sand, crushed stone and gravel reasonably in ordinary concrete, so that quality of sand and stone for ordinary concrete can be ensured. This Standard is applicable to quality requirements and test of sand and stone for ordinary concrete used in general industrial and civil buildings and structures.
