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Comparison Of Locally Excavated Sand With River Sand In Terms Of Strength In Sandcrete Blocks
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1.3 SANDCRETE BLOCK SIZES
They are many different types of blocks used in modern building, they include:
9†hollow blocks (450mmx225mmx225mm)
6†hollow blocks (450mmx150mmx225mm)
6†solid blocks (450mmx150mmx225mm)
5†solid blocks (450mmx125mmx225mm)
9†solid blocks (450mmx225mmx225mm)
1.4 CONSTITUENT MATERIALS OF SANDCRETE BLOCKS
These include cement, fine aggregate (sharp sand) and water.
1.4.1 CEMENT
This
refers to any adhesive and the material used in connection with block
and it is referred to as “hydraulic cement†because the setting and
hardening depends on the preserve of water. The cement widely used in
civil work is called “Ordinary Portland Cementâ€.
1.4.2 FINE AGGREGATE
The
two major types of sand used are white and coloured sand. The sand were
not free from materials such as dust, silt, tree roots etc. The sources
of sand include pits, rivers and sea.
1.4.3 WATER
Any type of water available can be used to mould sandcrete blocks. This includes water from stream, rivers, boreholes etc.
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