Table 6 Factors and levels.

CS (f _c )^a

21

30

MPa

Diameter (D)

100

150

mm

Thickness (t)

0.2 D

0.5 D

mm

Maximum aggregates size (as)

9.5 (3/8)

19.1 (5/8)

mm (inches)

LG^b–CUR; Contact angle (α)

10

22

degrees

LG^b–CUP; Contact angle (α)

5

12

degrees

LG^b–FUP; Contact angle (α)

12

25

degrees