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THE GEOGRID MYTH Woven Geotextiles-why they really work better! For subgrade stabilization applications where weak subgrade conditions exist, geogrids are limited in their effectiveness due to their low tensile strength, inability to separate and provide filtration, expensive mechanical connectors, and high cost. In subgrade stabilization applications the product that works best is often a woven geotextile. Woven geotextiles combine the properties of high tensile strength and modulus, and high confinement, in addition to their ability t0 act as a flter and separator. Woven geotextiles can also be seamed together to create uniform high strength in all directions. In fact, if you look at any subgrade stabilization application, woven geotextiles will always out perform geogrids, technically and economically. ~~ A Look at the Facts tells you why! • Properties of Mirafi HP Woven Geotextiles Versus Biaxial Geogrids ~~ MIRAFI Biaxial Geogrid MIRAFI Biaxial Geogdd Units HP370 Type1 HP570 Type2 MD XD MD XD Tensile Strength Ultimate Ibs/tt 2700 910 1410 - 4800 7278 2188 59'o Strain Ibs/tt 1350 620 890 2400 820 1340 29'o Strain Ibs/h 540 300 445 ~ 960 380 595 Interaction - Ci 0.8 0.8 0.95 0.8 Separation/Filtration Excellent None Excellent None These propertres were obtained fro m published manu/acturers' literature and act ual test programs. Technical Comparison -When you look at the key product properties required of a geosynthetic for subgrade stabilization applications-high tensile Strength and modulus, high Confinement, filtration, separation, and seam strength-HP Geotextiles far exceed those for geogrids in every category. In every category Mirafi HP woven geotextiles exceed the properties of geogrids, often by a factor of 2 or more. In addition, woven geotextiles provide separation and filtration functions, and can provitle multi-directional strengths in excess of 3000 pounds per foot, none of which are possible with geogrids. Economical Comparison -The material cost of the Mirafi HP woven geotextiles are 20 to 50 percent less than that of the geogrid alone, they are avail- able in wider roll widths and can be seamed together to reduce ovedap requirements. Mirafi HP geotextiles save time and money over geogrids any way you look at it! THE BOTTOM LINE - While TC Mirafi manufactures both woven and non-woven geotextiles and geogrids, if you need a geosynthetic product for subgrade stabilization applications, we recommend woven geotextiles every time. I1 L_J (Revised July 2006) 2.05.3(3)-37 GeogridS (right) aYOw son subgratle sills to pump Iluolx]h wMle woven geolexlYeS (ten) provide Seperelgn aril 10ration.