PD ISO/TR 20432:2007
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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Guidelines for the determination of the long-term strength of geosynthetics for soil reinforcement
Hardcopy , PDF
06-02-2023
English
30-05-2008
Foreword
1 Scope
2 Normative references
3 Terms, definitions, abbreviated terms and symbols
3.1 Terms and definitions
3.2 Abbreviated terms
3.3 Symbols
4 Design procedure
4.1 Introduction
4.2 Design lifetime
4.3 Causes of degradation
4.4 Design temperature
5 Determination of long-term (creep) strain
5.1 Introduction
5.2 Extrapolation
5.3 Time-temperature superposition methods
5.4 Isochronous curves
5.5 Weathering, chemical and biological effects
6 Determination of long-term strength
6.1 Tensile strength
6.2 Reduction factors
6.3 Modes of degradation
7 Creep rupture
7.1 Introduction
7.2 Measurement of creep rupture: conventional method
7.3 Curve fitting (conventional method)
7.4 Curve fitting for time-temperature block shifting of
rupture curves
7.5 Strain shifting and the stepped isothermal method
7.6 Extrapolation and definition of reduction factor or
lifetime
7.7 Residual strength
7.8 Reporting of results
7.9 Procedure in the absence of sufficient data
8 Installation damage
8.1 General
8.2 Data recommended
8.3 Calculation of reduction factor
8.4 Procedure in the absence of direct data
9 Weathering, chemical and biological degradation
9.1 Introduction
9.2 Data recommended for assessment
9.3 Weathering
9.4 Chemical degradation
9.5 Biological degradation
10 Determination of long-term strength
10.1 Factor of safety f[s]
10.2 Design for residual strength
11 Reporting
Bibliography
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