RAW MATERIAL REQUIREMENT
Description
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Specification
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Fly Ash:
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The Fly Ash used to
manufacture Fly Ash Bricks shall conform to Grade I or Grade II as per IS
3812:1981. SiO2 >= 40%, Al2O3 15 ~ 35%, SO3 >= 2%,
Loss on Ignition <= 12%.
50-60% |
Sand:
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Sand used to
manufacture Fly Ash Bricks shall conform to IS 1542:1992. Sand should be
medium coarse duly sieved and free from any impurity like Stones, Grass
Roots, Gravel.
25-40%
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Stone Dust:
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Stone Dust is
subsidiary raw material of sand where sand is available at very costly price.
25-40%
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Cement:
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Ordinary Portland
Cement - 53 Grade (OPC - 53).
5-8%
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Lime :
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: Hydrated Lime as
per IS: 712: 1984 or Sludge lime (By-product of acetylene Gas Plant). 10-12%
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Gypsum:
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:Chemical &
Mineral Gypsum. Gypsum should be free of lumps and having purity to the about
60 %. The purity of Gypsum can be tested by testing method specified in
IS : 1288 : 1982
2 - 5% |