Products

  Red Rajasri
Red Rajasri is the Ordinary Portland Cement Type 1. Its specification conforms to the Thai Industrial Standard for Mixed Cement TIS 15 Books 1-2545 TYPE 1 which is equivalent to the standard ASTM C 150-07 TYPE I of the United States.

More detail
     
  Green Rajasri
Green Rajasri Brand cement is mixed cement produced to meet the requirements of Thai Industrial Standard TIS 80-2550.

More detail
     
  Super Rajasri (40kg.)
Super Rajasri Brand cement is mixed cement produced to meet the requirements of Thai Industrial Standard TIS 80-2550.

More detail
     

  .............................................................................................................................................................................................
Production Process

    We produce cement using dry combustion system which is the most widely used and efficient
method today, because there is no water and less fuel consumption (per unit) used in cement
production process.
    Raw cement materials comprise limestone (Calcium Oxide) and clay, both black and red clay,
containing a suitable proportion of silica, alumina and iron oxide. They will be crushed,
homogenized, and processed through a preheat tower.Then, the mixture will be fed to a rotary
kiln whose diameter is approximately 4 meters and 60 meters in length, using heat temperature
around 1,500 C. The materials will react and transform to a chemical compound called clinker.
After that, the clinker will be rapidly cooled and passed to a cement mill at the grinding process. 
By adding gypsum to the cement powder, this will control setting time and hardening of cement
before packaging the finished cement or storing the cement powder in silo for further distribution.


  .............................................................................................................................................................................................

Storage

Cement should be
stored in dry place,
otherwise it will
deteriorate by hydration and
carbonation. In dry
condition, well-

maintained cement in silo can last for months. For cement supplied in bags, temperature and humidity is controlled properly in the storage area. We consistently audit and record to ensure quality of our cement products.   

Safety Precaution

When cement is mixed with water, an alkaline solution is formed. Therefore, a pair of suitable protective gloves should be worn before mixing cement. If cement contact directly to body, wash
it off immediately with clean water.