BLOCK CASTING IN SRILANKA

BLOCK CASTING

  • Generally, a ratio of 1:4:5 ( cement : sand : coarse aggregate ) is used for block casting for government construction works in Srilanka.
  • The mixture is poured into moulds of desired shapes and sizes. These molds can vary based on the intended use of the blocks. 
  • The blocks are kept moist for a specific period of time after they are cast. Curing is an important phase in the manufacture of concrete blocks, and effective processes can result in considerable increases in strength and durability.


CURING FOR BLOCK CASTING

  • the blocks should be completely submerged in water for at least 3 days.

  • For at least seven days after removing from the submerged water, hessian cloth or something similar is used to cover and curing the block to retain wetness and prevent water loss due to hydration. However, for better impacts, it can be extended up to 14 days.

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