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Portland Cement
SPECIFICATION OF ORDINARY PORTLAND CEMENT 42.5 or 53 – GRADE
ASTM C150, TYPE 1 Or
BS |
TEST
AND COMPLIANCE :
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PERTICULARS
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UNIT
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REQUIREMENT
OF
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IS 12269 :
1987
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A. CHEMICAL REQUIREMENTS :
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1.
Lime Saturation Factor
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0.80 - 1.02
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2.
Ratio of Percentage of Alumina to
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that of Iron Oxide
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0.66 Min
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3.
Insoluble Residue
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%
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3.00 Max
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( percent by mass )
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4.
Magnesia ( percent by mass )
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%
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6.00 Max
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5.
Sulphuric Anhydride (SO3 )
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%
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3.00 Max
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( Percent by mass )
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6.
Loss On Ignition
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%
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4.00 Max
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7.
Chloride ( Percent by mass )
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%
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0.10 Max
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B. PHYSICAL REQUIREMENTS :
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1.
Fineness ( Blaine )
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M2 / Kg
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225 Min
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2.
Soundness
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a.
Le. Chatelier Expansion
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mm
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10.00 Max
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b.
Autoclave Expansion
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%
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00.8 Max
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3.
Setting Time
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a.
Initial
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Minutes
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30 Min
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b.
Final
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Minutes
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600 Max
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4.
Compressive Strength
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a.
72+ 1 hours ( 3 days )
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Mpa
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27 Min
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b.
168 + 1 Hours ( 7 days )
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Mpa
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37 Min
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c.
672 + 4 hours ( 28 days )
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Mpa
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53 Min
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