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GB/T 1345-2005
The test sieving method for fineness of cement (TEXT OF DOCUMENT IS IN CHINESE)
This standard specifies the sieving test method for fineness of cement using standard sieves with 45 5m squared-hole and standard sieves with 80 5m squared-holes. This standard applies to Portland cement, ordinary Portland cement, Portland slag cement, Portland pozzolana cement, Portland fly-ash cement, composite cement, as well as other cement and powdered material that are specified to comply with the standard.
CHINESE GB Standards [spc]