How to Choose Between Fiberglass and Plastic Geogrid?
Choosing the right geogrid is important.
The right geogrid promotes the long term performance of your roads and soil.
Fiberglass geogrid and plastic geotextile geogrid are some of the most popular reinforcement materials.
On the face of it, they serve the same purpose.
Yet their construction and therefore performance is vastly different.
Learn the difference and you can promote better stability at lower project cost.
What Is Fiberglass Geogrid?
The core material here is high-strength glass fiber yarns.
Coated with a protective layer, typically of bitumen or PVC, for very high tensile strength and lower elongation.
You can think of fiberglass geogrid primarily used in asphalt reinforcement. It helps to minimize cracking and in turn extend the life of the pavement. Because of the temperature and load requirements, you’ll commonly find them in highways, airport runway and heavy duty road applications.
What is Plastic Geogrid?
These geogrids typically consist of HDPE or polypropylene usually formed by stretching and punching.
They have excellent flexibility, strong interlocking with soil or aggregate and unlike fiberglass, they have fairly higher elongation.
Plastic geogrids are used in many soil stabilization work. They also work well in soft soil and foundation reinforcement.They are both used in the same areas. Fiberglass geogrids easily perform the job of holding retaining walls and embankments together. They also support drives and slopes, and are cost effective when used across a wide area.
Key difference in performance of the two materials Fiberglass geogrid is rigid. It has low creep so stabilizes under heavy load over time. Plastic geogrid is flexible, can better fit into uneven ground conditions, but may display more deformation under load. Fiberglass geogrid better meets the need for reinforcement of asphalt layers. Plastic is best suited for soil reinforcement and as a structural support layer.
Material type not just price determines choice of geogrid type.
Load capacity, durability comparison. Fiberglass grid exhibits very high tensile strength. Its performance when subjected to an ongoing traffic load is excellent. Fiberglass geogrid has great temperature resistance, essential in hot climate construction for road. Plastic geogrid soil and underground suitable is good resistance, but since load road surface it is not as strong at high road load performance requirement, care must be taken to apply it correctly.
Installation and construction difference. Fiberglass geogrid is installed on top of the asphalt layer. Application must be done with proper bonding to the bitumen. Precise installation of must take place, or performance of application may not meet full specifications. Plastic grid may be installed easily in the soil layer, may be laid directly and then fill material placed over it on top for installation purposes. Plastic offers solid interlocking with the aggregates used, improving the overall stability of the construction ground.
Price and Application choose one. Plastic: always the more cost effective, use it if you are doing a large area ground reinforcement job. Fiberglass grid has a higher cost of material but the life service of the entire pavement structure is longer. For a service layer or road surface use fiberglass for sure, for soil support or retaining work, select plastic. Cost must always be weighed against requirements or you may find you must spend more in the long run when simply topically selected the wrong type of grid.