ASTM D8105-18R24

1.1 This guide presents a description of how to use test results from reduction factor test reports for reinforcement geosynthetics. It is based solely on testing and reporting requirements as established in American Association of State Highway and Transportation Officials (AASHTO) standard AASHTO R 69-15, Standard Practice for Determination of Long-Term Strength for Geosynthetic Reinforcement. AASHTO R 69-15 is used to determine the long-term allowable material strength, T_al, that is solely product property performance dependant.

1.2 This guide is intended to assist designers and users of reinforcement geosynthetics when reviewing reports of reduction factor testing efforts. This guide is not intended to replace education or experience, or other alternative design procedures. This guide is not intended to represent or replace the standard of care by which the adequacy of a given professional service must be judged, nor should this document be applied without consideration of a project’s many unique aspects. Not all aspects of this guide may be applicable in all circumstances. The word “standard” in the title of this document means only that the document has been approved through the ASTM consensus process.

1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.