This is the 11 th Francophone conference on geotextiles, geomembranes and related products organized by the French Committee on Geosynthetics (CFG). They are aimed at building owners, building owners, engineers, producers, distributors, specialized companies and laboratories. These technical meetings will include presentations, presentations, posters, a technical exhibition, exchange and training sessions. The papers will present concrete cases of applications of geosynthetics in Civil and Environmental Engineering illustrating the essential functions of these building materials. For more information, visit http://www.rencontresgeosynthetiques.org/.