Figure 1

Figure 2
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Figure 3

Figure 4
![Illustration of the GWT method for measuring water permeability [30].](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/6473793b4e662f30ba53f835/j_sgem-2021-0002_fig_004.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6AP2G7AKOUXAVR44%2F20251105%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20251105T012508Z&X-Amz-Expires=3600&X-Amz-Signature=f9b4fc64b62165042f64562dffbcb29b339be1649e4e191b5de403afbeef9143&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Figure 5

Figure 6
![Accuracy requirements for the determination of the flexural modulus [18].](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/6473793b4e662f30ba53f835/j_sgem-2021-0002_fig_006.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6AP2G7AKOUXAVR44%2F20251105%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20251105T012508Z&X-Amz-Expires=3600&X-Amz-Signature=5490bb4b76bf26688cc970a90c02d866776bc4b2e9fa6ce1485d62fb62efe593&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Figure 7

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Figure 16


![Technical conditions according to ATV 143-2; a) technical condition I; b) technical condition II; c) technical condition III; d) technical condition III a [5].](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/6473793b4e662f30ba53f835/j_sgem-2021-0002_fig_002.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6AP2G7AKOUXAVR44%2F20251105%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20251105T012508Z&X-Amz-Expires=3600&X-Amz-Signature=308cbad0b0338472994fc181dec4a22ccabcb003c5de7dc7ae356fc946e4e84b&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)

![Illustration of the GWT method for measuring water permeability [30].](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/6473793b4e662f30ba53f835/j_sgem-2021-0002_fig_004.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6AP2G7AKOUXAVR44%2F20251105%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20251105T012508Z&X-Amz-Expires=3600&X-Amz-Signature=f9b4fc64b62165042f64562dffbcb29b339be1649e4e191b5de403afbeef9143&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)

![Accuracy requirements for the determination of the flexural modulus [18].](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/6473793b4e662f30ba53f835/j_sgem-2021-0002_fig_006.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6AP2G7AKOUXAVR44%2F20251105%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20251105T012508Z&X-Amz-Expires=3600&X-Amz-Signature=5490bb4b76bf26688cc970a90c02d866776bc4b2e9fa6ce1485d62fb62efe593&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)










© 2021 Tomasz Abel, published by Wroclaw University of Science and Technology
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