Ordinary Portlanf Cement Clinker Technical Specifications

ACCORDING TO CHINESE STANDARD GB/T21372-2008

TESTING ITEMS

UNITS

Result of Analysis

STANDARD

TEST STANDARD

MAGNESIUM OXID  

MgO

%

3.98

5.0MAX

GB/T176-1996

SULFAR TRIOXIDE  

SO3

0.56

1.5MAX

CALCIUM OXIDE    

CaO

64.82

63.0 MIN

SILICON DIOXIDE   

SiO2

21.58

18-24  

ALUMINUM OXID  

Al2O3

4.51

4.0-9.5

FERRIC OXIDE     

Fe2O3

2.94

2.0-5.5

LOSS ON IGNITION 

LOI

0.28

1.5MAX

TOTAL ALKALI

Na2O+0.658K2O

0.59

0.60MAX

INSOLUBLE RESIDUE

IR

0.18

0.75MAX

F-CaO

1.32

 1.5MAX

3CaO·SiO2          

C3S

58.33

37-65  

GB/T21372-2008

2CaO·SiO2          

C2S

18.19

15-37 

3CaO·Al2O3         

C3A

6.98

6-15

4CaO·Al2O3·Fe2O3  

C4AF

8.94

7-18

BY CALCULATION

Initial Setting Time

minute

90

60MIN

GB/T1346-2001

Final Setting Time

132

300MAX

Compressive Strength @ 03 days

Mpa

32.4

25MIN

GB/T17671-1999

Compressive Strength @ 28 days

-

52.5M