Woven geotextiles consist of monofilament, multifilament, slit-film and/or fibrillated slit-film yarns. These types of yarns are woven into geotextile fabrics with conventional textile weaving machinery using a wide variety of traditional, as well as proprietary, weaving patterns. The variations are many and most all have a direct influence on the physical, mechanical and hydraulic properties of the fabric. The resulting woven geotextiles are typically flexible, exhibit high strength, high modulus, low elongation, and their openings are usually direct and predictable.
Nonwoven geotextiles consist of fibers that are either continuous filament yarns or short staple fibers which are then bonded together by various processes that can include a needling process that intertwines the fibers physically (needlepunched), or a chemical / thermal bonding operation that fuses adjacent fibers together. The resulting nonwoven geotextiles have a random fiber orientation with high porosity and permeability, indirect and unpredictable openings, a thickness ranging from thick felt to a relatively thin fabric, and low modulus with high elongation. Nonwoven geotextile fabrics are often referred to as ‘multipurpose’, and when used in filtration applications it is important to note that the actual mechanics of this function by nonwoven geotextiles are much different than the woven geotextiles.
These geotextiles meet all minimum required values specified by the Illinois Department of Transportation.
All State DOT approved geotextiles available upon request, we can deliver, or ship anywhere!
While some types of geotextiles are used in a wide variety of applications, others are more costly to manufacture and are used in very few, but very specific applications. Monofilaments achieve effective levels of Percent Open Area (POA), a property found critical to long-term filtration is unique to them. There is a sufficient quantity of distinct, measurable, uniform and unidirectional paths through the fabric that exist to allow for the release of troublesome migrating fines when used for filtration/drainage applications. This allows for the formation of a mini-graded ‘filter cake’ against the surface of the free-flowing ‘filter fabric’, and is the designers’ only insurance against long-term clogging of their filtration systems.
Another less common type of geotextile is called PET, a high strength class of geotextiles used to for perform functions such as reinforcement, separation, and confinement. They are produced of 100% high-tenacity, high molecular weight, multifilament filament polyester (PET) yarns. They deliver the higher ultimate tensile strength properties, resistance to installation damage, and exceptional creep resistance and soil interaction that results in higher long-term design strengths (LTDS).
The biaxial geogrid has been a staple of the geosynthetic industry for over 30 years. Our series of biaxial geogrids are produced of the highest grade polypropylene (PP), and include the commonly referred to type 1 and type 2 geogrids. As the result of decades proven technology, they provide the high flexural rigidity and tensile strengths along the ribs and at the junctions that are required for long-term interlock and confinement in soil stabilization and base reinforcement applications.