| Open Graded Friction Course |
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| Written by Administrator |
| Tuesday, 21 September 2010 08:05 |
 Open graded friction courses (OGFC) are typically characterized by an HMA mixture with a high void content, created by using a greater amount of coarse aggregate. Benefits commonly associated with this type of pavement include the rapid removal of water from the roadway surface, improved overall skid resistance, and reduced noise emissions.Another aspect of OGFC pavements which requires attention is the selection of an appropriate binder for the mix. OGFC mixes generally require greater film thicknesses than dense graded mixes. For this reason, it is very common to use modified asphalts, as these tend to exhibit the necessary film thicknesses for OGFC applications. Asphalt rubber in particular has been used very often in open graded mixes and has been shown to maintain the "open" structure of the pavement even in extreme weather conditions. The Illustration below shows how a typical interconnected void structure in an OGFC; this void structure permits rapid removal of storm water as well as providing a quieter roadway.  ECOPATH has extensive experience in suggesting the right pavement types to certain climatic zones/countries, moreover ECOPATH is dedicated to developing solutions with economic efficiency as a priority. Please contact us for further information on mix and binder design services. |
| Last Updated ( Saturday, 09 April 2011 02:14 ) |
