BSI PD ISO/TS 20432:2022 – TC 2023
$217.84
Tracked Changes. Guidelines for the determination of the long-term strength of geosynthetics for soil reinforcement
| Published By | Publication Date | Number of Pages |
| BSI | 2023 | 96 |
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 1 | 30469322 |
| 55 | A-30403025 |
| 56 | National foreword |
| 61 | Foreword |
| 63 | 1 Scope 2 Normative references 3 Terms, definitions, abbreviated terms and symbols 3.1 Terms and definitions |
| 64 | 3.2 Abbreviated terms 3.3 Symbols |
| 66 | 4 Design procedure 4.1 General 4.2 Design lifetime 4.3 Causes of degradation |
| 67 | 4.4 Design temperature 5 Determination of long-term creep strain 5.1 General |
| 68 | 5.2 Extrapolation 5.3 Time-temperature superposition methods |
| 69 | 5.4 Isochronous curves 5.5 Weathering, chemical and biological effects |
| 70 | 6 Determination of long-term strength 6.1 Tensile strength 6.2 Reduction factors 6.3 Modes of degradation |
| 71 | 7 Creep rupture 7.1 General |
| 72 | 7.2 Measurement of creep rupture: conventional method |
| 73 | 7.3 Curve fitting (conventional method) |
| 75 | 7.4 Curve fitting for time-temperature block shifting of rupture curves |
| 76 | 7.5 Strain shifting and the stepped isothermal method |
| 77 | 7.6 Extrapolation and definition of reduction factor or lifetime |
| 78 | 7.7 Residual strength 7.8 Reporting of results 7.9 Procedure in the absence of sufficient data |
| 79 | 8 Installation damage 8.1 General 8.2 Data recommended |
| 80 | 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 |
| 81 | 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 |
| 82 | 9.2 Data recommended for assessment 9.3 Weathering |
| 83 | 9.4 Chemical degradation 9.4.1 Causes of chemical degradation 9.4.2 Evidence from service experience |
| 84 | 9.4.3 Accelerated chemical degradation tests |
| 88 | 9.4.4 Oxidation of polyolefins |
| 89 | 9.4.5 Hydrolysis of polyesters |
| 91 | 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 |
| 92 | 10.2 Design for residual strength 11 Reporting |
| 93 | Bibliography |
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