Online Courses

Discount Packages

Ethics, Laws and Rules

Live Webinars

Video Presentations

Interactive Courses

Courses by Provider

Durability of Geosynthetics for Highway Applications

COURSE NO: C01-018
COURSE PROVIDER: Gilbert Gedeon, P.E.
Durability of Geosynthetics for Highway Applications
Course Highlights

This online engineering PDH course presents a study that addresses various aspects of geosynthetic durability to develop procedures that could be used to predict long-term strength losses of geosynthetics used in highway applications. These procedures are essential to designers for allowing tensile capacity for geosynthetics used primarily in mechanically stabilized earth (MSE) retaining walls, reinforced soil slopes, and foundation stabilization.


This study was initiated to allow voiced concerns that stress-cracking potential was not being considered in developing the allowable tension load capacity for design when using high-density polyethylene (HDPE) geogrids. Stress cracking is a potential mode of failure occurring in thermoplastic materials that are under a sustained stress significantly lower than the material’s room temperature yield strength, resulting in quasi-brittle fracture of the material. This is also known as slow crack growth and environmental stress cracking (ESC) when in contact with certain aqueous solutions.


This 1 PDH online course is applicable to all civil engineers, highway design professionals, transportation planners, material manufacturers and all personnel interested in learning about geosynthetics for highway applications.

Learning Objectives

This PE continuing education course is intended to provide you with the following specific knowledge and skills:

  • Developing testing protocols necessary to quantify any strength reduction due to aging or stress mechanisms for geosynthetics
  • Developing testing protocols for confined stress-strain testing, which could more accurately characterize key engineering properties
Course Document
In this professional engineering CEU course, you need to review the Federal Highway Administration (FHWA) Report No. FHWA-RD-97-142, "Durability of Geosynthetics for Highway Applications”.
To view, print and study the course document, please click on the following link(s):
Durability of Geosynthetics for Highway Applications (208 KB)
Course Quiz
Once you complete your course review, you need to take a multiple-choice quiz consisting of ten (10) questions to earn 1 PDH credit. The quiz will be based on this FHWA publication.
The minimum passing score is 70%. There is no time limit on the quiz, and you can take it multiple times until you pass at no additional cost.
Certificate of Completion

Upon successful completion of the quiz, print your Certificate of Completion instantly. (Note: if you are paying by check or money order, you will be able to print it after we receive your payment.) For your convenience, we will also email it to you. Please note that you can log in to your account at any time to access and print your Certificate of Completion.

To buy the course and take the quiz, please click on: