Test number

Design strength level

Workability description

Slump (mm)

Compressive strength (MPa)

3 days

7 days

28 days

20

C25

Good workability, good cohesiveness

185

10.4

14.9

24.3

21

C20

Good workability, good cohesiveness

190

7.7

11.5

19.6

22

C20

Poor workability

140

6.8

10.7

18.5

23

C25

Good workability

170

9.0

13.8

23.3

24

C25

Poor workability

145

8.9

14.2

23.3

25

C30

Good workability

175

11.6

18.3

28.6

26

C30

Poor workability

145

11.7

17.2

28.6