Civil Engineering Reference
In-Depth Information
Thermosetting plastics have been used a few times but have not become established due
to their brittle behaviour. Particularly the subsequent transfer of the waterproofing support
from outer support layer to inner lining led to damage.
Today only PVC or polyolefin foils are used for waterproofing tunnels. Numerous meth-
ods of testing the quality of these materials have been developed in recent years in order
to check their suitability for application and durability. All the necessary tests and the as-
sociated standards have been collected in the EAG-EDT. Due to the enormous extent of
this, only the most important tests are stated in the following tables:
Table 5-16
Summary of the most important quality tests for plastic membranes from [EAG-EDT].
Property
Testing according to
Requirements
standard
EAG-EDT
section
polyolefin-
based
PVC-P-based
General condition
DIN EN 1850-2
4.12.3
Free from bubbles, cracks, casting de-
fects and inclusions of foreign matter,
complete bonding of the signal layer
with the base material
Straightness (g)
Flatness (p)
DIN EN 1848-2
4.12.4
g
≤
50 mm
p
≤
10 mm
Dimensions
Thickness without signal layer
DIN EN 1849-2
4.12.6.1
Nominal thickness: 4.0 mm; 3.0 mm;
2.0 mm
Average value:
≥
nominal thickness
Smallest value.
≥
average value - 5 %
Largest value.
≤
average value + 5 %
Behaviour under tension
loading
Secant modulus
(E
1-2
modulus) in longitudinal
and transverse directions
Tension strength in longitudi-
nal and transverse directions
Failure strain in longitudinal
and transverse directions
DIN EN ISO 527-1
& 3
Test bodies 5
4.12.8.1
≤
100 N/mm²
≤
20 N/mm²
≥
15 N/mm²
≥
12 N/mm²
≥
500 %
≥
250 %
Piston penetration force
DIN EN ISO 12 236
4.12.10
determine value
Curved arc strain in burst test
DIN EN 14151
Test body Ø 1.0 m
4.12.11
≥
50 %
Water permeability
(sealing against liquids)
DIN EN 14150
4.12.13
waterproof
Behaviour in perforation test
DIN EN 19956
Appendix G
500 g
4.12.17
for nominal thickness 2mm: no leaks
under 750 mm fall height
for nominal thickness 3mm: no leaks
under 1250 mm fall height
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