Blastfurnace Cement

Blastfurnace Cement

1. Characteristics

   • Density : 3.04 g/cm3
   • Final Setting time: 600 min
   • Constituents
     • SiO2
     • Al2O3
     • CaO
     • MgO

2. Uses

   • Ready mix concrete plants
   • Structures meant
     • Water retaining
       • Walls, rivers, ports, tunnels, etc
   • Mass concreting
     • Dams
     • Foundaitions
   • Places susceptible to chloride and sulphate
     • Sub-structure
     • Bored piles
     • Pre-case piles
     • Marine Structures

3. Advantages

   • The initial strength is lesser
   • The ultimate strength is equal and sometimes higher
   • Good resistance towards sulphate and chloride attack
   • initial setting time is more
   • Greater durability and reduced permeability
   • Colour obtained is lighter coloured when compared to conventional cement
   • Production cost this cement is less
   • Can be used where the problem of thermal cracking is foreseen

4. Disadvantages

   • Initial Strength is low
   • Initial setting time is high
     • Not used for emergency or repair works