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CSA Cement VS OPC Cement

Compared to OPC cements, firstly, the primary advantage of CSA cements is to formulate high strength in three days. The concretes, grouts and mortars made with CSA Cement, can easily be formulated to achieve compressive strengths in excess of 35MPA in just a few hours. It is possible to attain desired 28 day strength in 24 hours to 3 days with CSA cements. Rapid setting and high early strength is the main characters of the CSA cements.
Due to these characters, the CSA cements gain is critical in situations where an airport runway, a bridge repair or a damaged freeway must be returned to service in a very short amount of time.
Secondly, a key feature of CSA cements is in the difference in the amount of energy used to product CSA Cement and Portland cement. Portland cement requires kiln temperatures of around 1500°C, whereas CSA cements require only around 1300°C.
The CSA clinker is softer than OPC clinker, requiring less energy at the mill to grind it and significant lower energy to run through the kiln.
However, the OPC and CSA cements can be blended to get suitable setting time and strength, please refer to below table as reference

MIX PROPORTIONS AND PROPERTIES OF THE BLENDED CEMENTS OF CSA AND OPC

No.

Proportions

(%)


Normal consistency,

(%)

Setting time(min)

Comressive Strength(MPa)

Bending Strength

(MPa)

CSA

OPC

Initial

Final

1d

2d

28d

1d

2d

28d

1

100

0

26

47

167

33.05

40.9

54.68

5.34

6.8

8.77

2

90

10

26.75

25

87

31.67

37.4

51.02

5.99

6.43

8.22

3

80

20

29.5

23

44

30.19

34.4

48.01

5.92

6.64

7.93

4

70

30

33

21

33

27.3

30.3

39.4

5.57

6.04

6.4

5

60

40

32.5

9

14

18.1

27.3

44.2

5.1

6.2

6

6

50

50

29

7

11

13.1

18.8

43.9

3.8

5.0

7.4

7

40

60

29

16

22

16.2

21.9

48.5

4.3

6

8.5

8

30

70

28.5

29

38

10.5

23.8

53.3

3.5

5.8

9.6

9

20

80

28.5

38

56

10.9

28

52.7

3.4

6.5

10

10

10

90

29

133

224

11.7

27.4

55.1

3.4

6.1

9.2

11

0

100

27.5

157

245

12.0

27.9

52.4

3.5

6.4

8.9


The grade of cement is CSA cements 52.5 and OPC 52.5.

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