- Hollow and dense cement concrete blocks known as hollow blocks, have been developed as an alternative to bricks.
- The products are widely used in construction activity.
- They are lighter than bricks, easier to place and also confer economics in foundation cost and consumption of the cement.
- The hollow blocks are made of cement, stone chips, stone dust and sand are not onlycheaper than bricks but have other specialities as well. These blocks have more tensile strength, the walls constructed from these blocks act as thermal insulaters because of their hollowness.
- These blocks find wide applicability and construction cost is largely reduced.
- It is also observed that there is good demand for housing activity among tribals.
- As the construction activity is growing day by day, there is a good demand for hollow and cement concrete bricks.
Manufacture Process
- Cement concrete blocks can be solid (dense) or hollow.
- Besides different sizes and designs can be given to the blocks.
- The blocks are made in the sizes of 12×8x4″;12×8x3″; 12×8x6″, etc.
- The ratio of cement, sand and stone chips (metal) to be mixed determines the properties of hollow concrete blocks.
- A ratio of 1:3:6 [cement: sand: metal (chips)] confers higher strength.
- This mixture is put in vibrator machine.
- This is then poured into the desired size mould.
- After 24 hours of drying, the blocks are put in water tank for curing.
- The process of curing continues for two to three weeks to give the blocks compressionstrength.
- The blocks are used in construction process after drying.
Originally posted 2009-12-24 17:06:18.
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