PARTICULARS
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REQUIREMENT AS PER IS:2547
(Part-1)-1976 Type A
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OUR RESULT
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A.CHEMICAL REQUIREMENTS
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|
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1.Sulphuric Anhydride(SO3) % Mass
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35 minimum
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40-45
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2.Calcium Oxide(CaO) % by Mass
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2/3 of SO3
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28-35
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3.Soluble Magnesium Salt expressed as % of MgO
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0.2 Max
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0.15
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4.Total loss on ignition % by mass
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Not greater than 9%
and not less than 4%
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4.5-7.5
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B.PHYSICAL REQUIREMENTS
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|
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1.Setting time(neat plaster) minutes
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20-40 minutes
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20-30
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2.Transverse strength(kg/cm2)
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5 minimum
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10-15
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3.Residue on 90 micron sieve(% by weight)
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3.50
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3-4
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