Number of test-pieces

Thickness (mm)

Material density, dry (kg/m3)

Material moisture (on site), of dry weight (%)

Bending strength MOR (MPa)

Bending stiffness

MOE (MPa)

Elements aged 7 days

40

15.8 (2.1)

8417 (1396.3)

Elements after 13 years weathering

25

Span of measured values

25.9 - 33.0

1400 - 1530

12.0 - 18.4

14.8 - 19.1

5880 - 7906

Average value and standard deviation

28.1 (2.95)

1473 (57)

15.9 (3,3)

16.6 (1.7)

7440 (975)