Table 3 Fresh and hardened concrete properties.

Slump (mm)

203

–

51

–

Slump flow (mm)

–

610

–

597

J-Ring (mm)

–

527

–

546

Air content (%)

6

6

2.5

3

Unit weight (kg/m³)

2240

2330

2440

2400

Split cylinder strength (MPa)^a

3.0

3.6

3.9

3.9

Flexural strength (MPa)^b

3.4

3.4

4.8

3.7

Compressive strength (MPa)^a

39.4

47.2

66.4

67.2