Table 1 Mean WPG values before (WPG) and after leaching (WPG_EN84) of EN 113–2 [16] test specimens: 25 × 15 × 50 (L) mm; short-term water uptake and release test (Meyer-Veltrup et al. [31]) specimens: 10 (R) × 5 (T) × 100 (L) mm; floating (CEN/TS 16818 [32]) specimens: 25 (R) × 50 (T) × 50 (L) mm and submersion tests (CEN/TS 16818 [32]) specimens: 25 (R) × 50 (T) × 150 (L) mm

0

 + 

n/a

n/a

n/a

− 0.79 ± 0.14

n/a

− 1.19 ± 0.09

n/a

− 0.35 ± 0.15

−

n/a

n/a

n/a

n/a

n/a

n/a

n/a

n/a

10

 + 

11.02 ± 0.6

9.9 ± 0.5

11.01 ± 1.02

9.48 ± 1.02

12.82 ± 0.37

11.92 ± 0.31

12.40 ± 0.66

12.04 ± 0.67

−

n/a

n/a

11.07 ± 1.52

n/a

12.85 ± 0.50

n/a

11.59 ± 0.96

n/a

20

 + 

22.6 ± 1.0

21.7 ± 1.1

24.17 ± 2.61

23.29 ± 2.44

26.90 ± 0.72

26.39 ± 0.63

26.06 ± 1.45

25.85 ± 1.43

-

n/a

n/a

24.05 ± 2.97

n/a

28.13 ± 2.54

n/a

28.73 ± 1.62

n/a

30

 + 

33.0 ± 1.6

31.8 ± 1.6

37.52 ± 2.66

36.81 ± 2.64

41.74 ± 1.05

41.33 ± 0.97

41.37 ± 2.21

41.79 ± 2.21

-

n/a

n/a

39.10 ± 3.53

n/a

41.98 ± 2.01

n/a

42.31 ± 2.77

n/a

50

 + 

58.1 ± 2.8

57.0 ± 2.7

64.28 ± 6.04

63.71 ± 5.72

73.76 ± 1.89

73.46 ± 1.79

77.19 ± 5.85

79.84 ± 5.78

−

n/a

n/a

67.09 ± 6.80

n/a

73.85 ± 3.75

n/a

79.00 ± 3.00

n/a