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ARA Independent Review & Validation:

Tensar's Modifid 1993 AASHTO Pavement Design Procedure and Verification of SpectraPave4-PRO Software

ARA Independent Review & Validation:

Recommended Practice for Incorporating Geogrids in ME Pavement Design

Research Reports:
Tensar TriAx Testing for Pavement Optimization

Full-Scale Accelerated Testing of Multi-axial Geogrid Stabilized Flexible Pavements

Geogrid in M-E Pavement Design

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What Is APT

Structural Condition Assessment of Reinforced Base-Course Pavement

How Geogrids Work

Tensar geogrid products are the most rigorously tested geogrids in the world. This testing includes laboratory evaluations, significant Accelerated Pavement Testing programs, in-situ field testing using different materials and loading conditions, 3rd party reviews, and ongoing pavement performance monitoring. Each year, Tensar invests significant time and money to document the performance of our products and provide engineers with the best possible solutions for their projects. Many additional research documents, design tools and software are available. For more information, please reach out to your Tensar Regional Sales Manager or click the link below.

Evaluating Geogrid Equivalence in Pavement Design

AASHTO R50-09, Standard of Practice
Design procedures use experimentally derived input parameters that are often geosynthetic specific. Thus, computed engineering designs and economic benefits are not easily translated to other geosynthetics. Therefore, users of this document are encouraged to affirm their designs with field verification of the reinforced pavement performance, both in engineering design and economic benefits.

SHORT ANSWER: The physical properties of geogrids do not correlate directly to full-scale testing results. They are not inputs to accepted pavement design methods and cannot be used to predict in-ground performance or compare geogrid products. More details on physical properties, such as tensile strength, can be found on the Frequently Asked Concerns and Questions Comparing Geosyntehtics for Roadbed Applications page.

FAQs When Comparing Geosynthetics for Roadbed Applications

Evaluating Engineered Solutions

What properties matter in a geosynthetic when it is being incorporated into a pavement design?

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Design values need to be based on full-scale, highly controlled and monitored testing. Values and design methods should be reviewed by independent authorities with expertise in pavement design and geosynthetics.

What testing and review should be performed to accurately develop design parameters and model performance of geogrids in roadbed applications?

SHORT ANSWER: Testing and review needed, as outlined by recognized pavement design experts, includes laboratory testing, full scale 3rd party Accelerated Pavement Testing, 3rd party Expert Review and 3rd party field validation.

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How do I know if a product has gone through the proper calibration?

Any manufacturer or distributor claiming its products have been properly tested and calibrated should be prepared to provide the documentation outlined in this checklist.