CEMENT 52.5, OPC 53 Grade Cement

SPECIFICATIONS 

Index Name

Internal Control Index

GB/T2015—2005 Requirements

Strength

3 days

28 days

3 days

28 days

Flexural Strength, Mpa

6.0

8.3

4.0

7.0

Compressive Strength, Mpa

38.0

58.0

22.0

52.5

Degree of Fineness 80um,%

<1.0%

Maximum 10%

Setting Time, Initial Setting

121 minutes

No earlier than 45 minutes

Setting Time, Final Setting

164minutes

No later than 10 hours

Whiteness

≥89

Minimum 87

Sulfur trioxide, %

2.82

Maximum 3.5%

Alkali content, %

0.25