Deformación permanente de materiales granulares en pavimentos flexibles: estado del conocimiento

several studies have been conducted in pavement field for trying to understand the elastoplastic behavior experienced by granular materials under a cyclic load. this is the second out of two articles which show state-of-the-art of researches conducted in this field. based on a wide literature review, this article accounts for the way how permanent strain phenomenon has been studied in granular materials used for creating base and sub-base layers of flexible pavement structures. besides, this article displays and discusses factors which affect resistance to permanent strain and evolution of mathematical equations developed for predicting that strain experienced by these materials under a cyclic load. a state-of-the-art about resilient behavior of these materials has been presented in the first article (rondón and reyes, 2007).