COMMODITY

TYPE

TYPE OF KILN

TEST STANDARDS

CEMENT

PO/PC

ROTARY KILN

GB175-2007

TEST ITEM

UNIT

MANDATORY TARGETS

 (32.5/R)      

MANDATORY TARGETS            

  (42.5/R)      

MANDATORY TARGETS (52.5/R)

SOUNDNESS

mm

≤10

≤10

≤10

SO₃

%

≤3.5

≤3.5

≤3.5

MGO

%

≤5.0

≤5.0

≤5.0

ALKALI EQ ( NA₂O+0.658K₂O)

%

≤0.6

≤0.6

≤0.6

CHLORIDE CONTENT

%

≤0.06

≤0.06

≤0.06

DEGREE OF FINENESS (80UM/45UM) 

%

≤10/≥30

N.A

N.A

FINENESS (SPECIFIC SURFACE)

m²/kg

N.A

≥300

≥300

LOSS ON IGNITION  

%

≤5.0

≤5.0

≤5.0

INSOLUBLE RESIDUE 

%

N.R.

N.R.

N.R.

SETTING TIME 

INITIAL

h/min

≥00:45

≥00:45

≥00:45

FINAL 

≤10:00

≤10:00

≤10:00

FLEXURAL RIGIDITY

3 DAYS

Mpa

≥2.5/3.5

≥3.5/4.0

≥4.0/5.0

28 DAYS

≥5.5

≥6.5

≥7.0

COMPRESSIVE STRENGTH

3 DAYS

≥10/15

≥17/22

≥23/27

28 DAYS

≥32.5

≥42.5

≥52.5