Portland cement

32.5

32.5R

Items

Units

National

Internal

National

Internal

Sample size

Kg

/

5.0

/

5.3

SO3

%

≤3.5

2.4

≤3.5

2.5

MgO

%

≤6.0

1.1

≤6.0

1.4

Cl

%

≤0.06

0.01

≤0.06

0.01

Fineness

(residue on sieve, 80µm)

%

≤10.0

0.2

≤10.0

0.2

Time

Initial

H:Min

≥0:45

4:50

≥45

228

Final

H:Min

≤10:00

5:45

≤600

368

Soundness pat test

/

past

/

past

Bending strength

3d

MPa

≥2.5

4.8

≥3.5

4.8

28d

MPa

≥5.5

7.3

≥5.5

7.5

Compressive

strength

3d

MPa

≥10.0

25.4

≥15.0

22.8

28d

MPa

≥32.5

42.2

≥32.5

43.6