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Tenax Rock-in-Roll is a high tensile, low compressibility Void-Maintaining structure, which replaces free-draining aggregate underneath concrete slabs. Rock-in-Roll is comprised to top and bottom layers of geotextile sandwiched around a center Void-Maintaining geonet. The Void-Maintaining geonet in this structure is composed of top and bottom horizontal ribs separated by strong vertical ribs.
Rock-in-Roll is hydraulically equivalent to 4 inches of open-graded/free-drainable base course. When compared to natural drainage mateial, Rock-in-Roll maintains its performance criteria as a controlled manufactured product, under the construction loads and conditions. On the contrary, the natural drainage material is exposed to the contamination of finer soil during or after construction. Rock-in-Roll helps the concrete slab to reach the commonly required water-vapor emission rate in a shorter period of time, by providing a second surface for water to drain. Rock-in-Roll causes no negative effects on the compressive strength of concrete at any age.
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