Red Rajasri




 
 
 

Product Quality Standard
Red Rajasri is the Ordinary Portland Cement Type 1. Its specification conforms to the Thai Industrial Standard for Mixed Cement TIS 15 Books 1-2555 TYPE 1 which is equivalent to the standard ASTM C150-07 TYPE I of the United States.

Application
Red Rajasri Brand cement is used for concrete production by blending it with sand, stones, and water
according to required mixture ratio for construction works. Concrete made from Red Rajasri Brand
cement can be used in high compressive strenght works such as buildings, roads, bridges, and dam.
Besides, Red Rajasri Brand cement is also suitable for precast and prestressed product manufacturing
such as solid planks, reinforce concrete drainage pipes, and concrete tiles.

Ingredient

 

 

Requirements

TIS. 15-2555 Vol.1

ASTM. C150-07

RAJASRI RED

Chemical Requirements

 

 

 

Magnesium oxide (MgO)                                    Percent Max.

6.0

6.0

3.0

Sulfur trioxide (SO3)

 

 

 

When  3CaO. Al2O3  ≤ 8.0                                  Percent Max.

3.0

3.0

2.5

When  3CaO. Al2O3  > 8.0                                  Percent Max.

3.5

3.5

-

Loss on ignition                                                  Percent Max.

3.0

3.0

1.5

Insoluble residue                                                Percent Max.

0.75

0.75

0.5

Mineral Requirements

 

 

 

Tricalcium silicate (C3S)                                         Percent

-

-

58.0

Tricalcium aluminate (C3A)                                    Percent

-

-

7.5

Physical Requirements

 

 

 

Air content of mortar                                          Percent Max.

12.0

12.0

7.0

Fineness: Specific surface by Blaine air

 

 

 

permeability

 

 

 

                                                               cm2 per

 

 

 

       Average value                                                  gm Min.

2800

2800

3400

Soundness: Autoclave expansion Percent Max.

0.8

0.8

0.1

Compressive strenght of mortar cube MPa(kgf/cm2)

 

 

 

       1 Day in moist air, 2 days in water                           Min.

12.0 (120)

12.0 (120)

20.0 (205)

       1 Day in moist air, 6 days in water                           Min.

19.0 (195)

19.0 (195)

30.0 (305)

       1 Day in moist air, 27 days in water                         Min.

-

-

40.0(405)

Time of setting: Vicat test Minute

 

 

 

       Initial Set Min.

45

45

95

       Final Set Max.

375

375

220

False set , Final penetration Percent Min.

50.0

50.0

85.0