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Cement:：ORDINARY PORTLAND CEMENT  P.O*2.5  GRADE
SPECIFICATIONS :STANDARD PARAMETERS OF CEMENT PO *2.5 WITH GB*******7
CATEGORY GB*******7    QUALITY  INDEX GRADE:PO*2.5
SOUNDNESS (MM) QUALIFIED
(SO3)(%) ≤3.5
(MGO)(%) ≤5.0
ALKALI ( NA2O*0.**8K2O)(≤0.6%)* ***-
CHLORIDE CONTENT (%)  * ≤0.*6
DEGREE OF FINENESS   (*0UM)(%) ***-
FINENESS (SPECIFIC SURFACE) (M2/KG ) ≥**0
LOSS ON IGNITION  (%) ≤5.0
INSOLUBLE RESIDUE (%) ***-
SETTING TIME (H : M)
 INITIAL TIME  ≥0:*5
 FINAL  TIME  ≤*0:0
FLEXURAL STRENGTH (MPA)
 3 DAYS ≥3.5
 *8 DAYS ≥6.5
COMPRESSIVE STRENGTH (MPA)
 3 DAYS ≥*7
 *8 DAYS ≥*2.5
*（SELECTIVE INDEX）
standard ：THE SPECIFICATION OF QUALITY CONFORMING TO GB *******7 STANDARD, CHINA