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BSI PD ISO/TS 20432:2022 2023

BSI PD ISO/TS 20432:2022 2023

$167.15

Guidelines for the determination of the long-term strength of geosynthetics for soil reinforcement

Published By Publication Date Number of Pages
BSI 2023 42
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PDF Catalog

PDF Pages PDF Title
2 National foreword
7 Foreword
9 1 Scope
2 Normative references
3 Terms, definitions, abbreviated terms and symbols
3.1 Terms and definitions
10 3.2 Abbreviated terms
3.3 Symbols
12 4 Design procedure
4.1 General
4.2 Design lifetime
4.3 Causes of degradation
13 4.4 Design temperature
5 Determination of long-term creep strain
5.1 General
14 5.2 Extrapolation
5.3 Time-temperature superposition methods
15 5.4 Isochronous curves
5.5 Weathering, chemical and biological effects
16 6 Determination of long-term strength
6.1 Tensile strength
6.2 Reduction factors
6.3 Modes of degradation
17 7 Creep rupture
7.1 General
18 7.2 Measurement of creep rupture: conventional method
19 7.3 Curve fitting (conventional method)
21 7.4 Curve fitting for time-temperature block shifting of rupture curves
22 7.5 Strain shifting and the stepped isothermal method
23 7.6 Extrapolation and definition of reduction factor or lifetime
24 7.7 Residual strength
7.8 Reporting of results
7.9 Procedure in the absence of sufficient data
25 8 Installation damage
8.1 General
8.2 Data recommended
26 8.3 Calculation of reduction factor
8.4 Procedure in the absence of direct data
8.4.1 General
8.4.2 Interpolation from measurements with different soils
27 8.4.3 Interpolation between products of the same product line
8.4.4 Laboratory damage tests
9 Weathering, chemical and biological degradation
9.1 General
28 9.2 Data recommended for assessment
9.3 Weathering
29 9.4 Chemical degradation
9.4.1 Causes of chemical degradation
9.4.2 Evidence from service experience
30 9.4.3 Accelerated chemical degradation tests
34 9.4.4 Oxidation of polyolefins
35 9.4.5 Hydrolysis of polyesters
37 9.4.6 Procedure in the absence of sufficient data
9.5 Biological degradation
10 Determination of long-term strength
10.1 Factor of safety fs
38 10.2 Design for residual strength
11 Reporting
39 Bibliography

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BSI PD ISO/TS 20432:2022 2023
$167.15