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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 :

PERTICULARS

UNIT

REQUIREMENT OF

IS 12269 : 1987

A. CHEMICAL REQUIREMENTS :

1. Lime Saturation Factor

0.80 - 1.02

2. Ratio of Percentage of Alumina to

that of Iron Oxide

0.66 Min

3. Insoluble Residue

%

3.00 Max

( percent by mass )

4. Magnesia ( percent by mass )

%

6.00 Max

5. Sulphuric Anhydride (SO3 )

%

3.00 Max

( Percent by mass )

6. Loss On Ignition

%

4.00 Max

7. Chloride ( Percent by mass )

%

0.10 Max

B. PHYSICAL REQUIREMENTS :

1. Fineness ( Blaine )

M2 / Kg

225 Min

2. Soundness

a. Le. Chatelier Expansion

mm

10.00 Max

b. Autoclave Expansion

%

00.8 Max

3. Setting Time

a. Initial

Minutes

30 Min

b. Final

Minutes

600 Max

4. Compressive Strength

a. 72+ 1 hours ( 3 days )

Mpa

27 Min

b. 168 + 1 Hours ( 7 days )

Mpa

37 Min

c. 672 + 4 hours ( 28 days )

Mpa

53 Min


 

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