Table 1 Preliminary test results on OPC 43 grade cement

Normal consistency (in %)

29.5

No standard value

IS:4031 part 4, 1988 [15]

Setting time (in minutes)

 i) Initial setting time

135

Not less than 30

IS:4031 part 5, 1988 [16]

 ii) Final setting time

245

Not more than 600

Specific gravity (Le-Chatelier’s flask)

3.14

IS:4031 part 11, 1988 [17]

Fineness, % (dry sieving)

6.2

Not more than 10

IS:4031 part 1, 1996 [18]

Fineness by Blain’s air permeability method (m²/kg)

275

Not less than 225

IS:4031 part 2, 1999 [19]

Soundness

(Le Chatelier’s method), mm

0.5

Not more than 10

IS:4031 part 3, 1988 [20]

Compression strength (MPa)

 3 days

25.48

23

IS:4031 part 6, 1988 [21]

 7 days

37.67

33

 28 days

46.58

43