Ordinary portland cement 42.5,42.5R

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Portland cement

   

Items

Units

National

Internal

National

Internal

Sample size

Kg

/

 

/

 

SO3

%

≤3.5

 

≤3.5

 

MgO

%

≤6.0

 

≤6.0

 

Cl

%

≤0.06

 

≤0.06

 

Loss

%

≤5.0

 

≤5.0

 

Fineness

(specific surface)

 

/kg

 

≥300

 

358

 

≥300

 

385

Standard consistency water

 

%

 

/

 

 

/

 

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

≥3.5

 

≥4.0

 

28d

MPa

≥6.5

 

≥6.5

 

Compressive

strength

3d

MPa

≥17.0

 

≥22.0

30

28d

MPa

≥42.5

 

≥42.5

 



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