Manufacturing Process of Concrete Block

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The process of manufacturing is simple and standardized. Concrete block is a mixture of cement, sand and stone chips in correct proportions. The items are mixed in water and churned thoroughly in a concrete mixture. 


The process involves proportioning, Mixing, Compacting, Curing & Drying. A concrete mix of 1:2:4 :: cement: sand: stone chips by volume are used for making paving blocks.
All the items of raw material are placed in the concrete mixer and water added. The mixer is then rotated for 15-20 minutes. The mixed material is then discharged on to the moulds. Care is taken that the mixture does not dry. Vibrators are employed during the process of pouring the mix so as to ensure that it sets well and is compact there is no porosity. 

After compacting the blocks are demolded and allowed to dry for 24 hours away from direct sun. The blocks thus hardened are cured with water to permit moisturisation or settling of cement for next 20 days. The water in the curing tanks is generally changed every 3 days. After being cured the blocks are allowed to dry in shade so that initial shrinkage of the blocks is complete before they are used. This generally takes 15 days.

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