Historical
GB/T 1345-1991
Test method for fineness of cement--The 80æm sieve (TEXT OF DOCUMENT IS IN CHINESE)
This standard specifies the test method for fineness of cement using 80 5m sieves. This standard applies to Portland cement, ordinary cement, slag cement, pozzolana cement, fly-ash cement, and other cement that is specified to comply with the standard.
CHINESE GB Standards [spc]