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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