POSSIBILITIES OF DESIGNING UNBOUND BASE LAYERS OF FLEXIBLE ROAD PAVEMENTS REGARDING THE RESULTS OF THE STUDY OF DEFORMATION BEHAVIOR OF GRANULAR MIXTURES

Abstract

Introduction. The introduction to the paper highlights the role of the modeling of deformation behavior of unbound granular mixtures (UGMs) under repeated mechanical loading as the base aspect of designing flexible road pavement with an unbound base layers due to the fact that UGMs have been recognized as the most vulnerable materials of the flexible road pavement under action of negative climatic (seasonal) or technogenic factors. Problem statement. The issues of the paper concern the problems related to unstable deformation behavior of UGMs in unbound base/subbase layers during flexible road pavement designing and maintenance. Purpose. The main goal of the paper is to perform an analytical review of the theoretical background to the construction and calculation of an unbound base layer of the flexible road pavement according to the results of the study of UGMs’ deformation behavior with their following categorization. The results of the analytical review are intended to be used during implementation of a national standard concerning the method of testing of unbound granular mixtures by the triaxial cyclic loading identical to the related European standard.

Keywords

• road