Una alternativa a las mezclas MAM de alto módulo para capas de base, de larga duración, económicamente eficientes y eco-amigables.

The innovative GB5® design is based on aggregate packing concepts initially developed in the field of high-performance cement concretes, adapted and transposed to the field of asphalts. These innovative mixes are characterized by single or double gapgraded curves and great coarse aggregate interlock, which lends them an excellent dense mineral skeleton, with high internal friction and high mechanical resistance, I without need for hard bitumens to meet requirements of high stiffness (11,000 MPa at s|| 20°C) neither for the binder contents of High Modulus mixes. This lower binder content requirements, enables the use of polymer modified binders in base courses, at a content of about 4% to 4.5% on aggregate, thus leading to design of the so-called GB5 ® asphalts, characterized by great compactability, a very high stiffness modulus and a high fatigue resistance in a single formulation, allowing for reduced pavement thickness and increased longevity. And all of that ensuring the cost-effectiveness of this solution for base courses. In this way, the proposed GB5® material may be potentially considered as a relevant solution for sustainable long-life pavements that do not deteriorate structurally, ; |î needing only timely surface maintenance. The design of this innovative mixture was presented in "European Roads Review" magazine (www.rgra.fr)(|y||). This paper it mainly focuses on the different achievements of this new material on the field on different work sites in 2011<">, located mainly in France, as well as on a campaign of strain measurement instrumentation carried out in 2012,(XXIV). [ABSTRACT FROM AUTHOR]