ASTM D5819-2018 pdf free download

ASTM D5819-2018 pdf free download.Standard Guide for Selecting Test Methods for Experimental Evaluation of Geosynthetic Durability
1. Scope
1.1 This guide covers a designer/specifier through a system- atic determination of those factors of the appropriate applica- tion environment that may affect the post-construction service life of a geosynthetic. Subsequently, test methods are recom- mended to facilitate an experimental evaluation of the durabil- ity of geosynthetics in a specified environment so that the durability can be considered in the design process. 1.2 This guide is not intended to address durability issues associated with the manufacturing, handling, transportation, or installation environments. 1.3 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
4. Summary of Guide
4.1 The effects of a given application environment on the durability of a geosynthetic must be determined through appropriate testing. Selection of appropriate tests requires a systematic determination of the primary function(s) to be performed and the associated degradation processes that should be considered. This guide provides a suitable systematic approach. 4.2 Primary functions of geosynthetics are listed and de- fined in Table 1. With knowledge of the specific geosynthetic application area and end use, the corresponding primary function(s) is (are) identified. Table 2 gives degradation con- cerns as they relate to geosynthetic functions. Table 3 gives the environmental elements that relate to the various degradation processes and the currently available ASTM Committee D35 test method for the experimental evaluation ofspecific types of geosynthetic degradation. The following appendixes are in- cluded to provide background information:
5. Significance and Use
5.1 Designers/specifiers of geosynthetics should evaluate geosynthetic durability as an integral part of the geosynthetic specification/selection process. This guide is intended to guide a designer/specifier through a systematic determination of degradation concerns based on the intended geosynthetic function or performance characteristic. This guide then pro- vides a guide to select available test methods for experimen- tally evaluating geosynthetic durability and to identify areas where no suitable test exists. 5.2 This guide does not address the evaluation of degrada- tion resulting from manufacturing, handling, transporting, or installing the geosynthetic.
6. Suggested Procedure
6.1 To utilize a structured procedure for selecting appropri- ate test methods, the geosynthetic designer/specifier must have knowledge of: 6.1.1 The intended geosynthetic application, 6.1.2 The end use of the geosynthetic via its primary function(s) or performance characteristic(s), or both, 6.1.3 The specific environment to which the geosynthetic will be exposed, 6.1.4 The types of geosynthetics that may or will be used, and 6.1.5 The duration or time of use (that is, service life). 6.2 With this knowledge, the designer/specifier follows the following procedure: 6.2.1 Identify the primary function(s) or performance characteristic(s), or both, to be performed by the geosynthetic in the specific application and end use intended. Functions and performance characteristics are defined in Table 1. (Tables for guidance in identifying primary function(s) and performance characteristics are given in Appendix X2.) 6.2.2 Using Table 2, identify the potential degradation process(es) that will almost always (denoted as “A”) or sometimes (denoted as “S”) be ofconcern when a geosynthetic performs the primary function(s) or provides the performance characteristic(s), or both, which were identified in 6.2.1. Appendix X1 contains associated notes to Table 2 that help to identify the process(es) that is (are) sometimes a concern in the specific expected application environment.