Research of strength measurement methods on subgrade of experimental road pavement

Abstract

Pavement is one of the most important structural elements of road. It is continuously affected by static and dynamic traffic loads and climate change. Due to the impact of traffic and climate the physical and mechanical properties of subgrade soils and materials of the structural pavement layers change. A rapidly increasing heavy traffic volume, a growth of normative axle load from 10 to 11,5 t on the main roads of Lithuania force the scientists to look for new durable road building materials and their mixtures. A continuously increasing need for the strengthening of road pavement structures in Lithuania induces to implement new road reconstruction technologies, to look for new alternatives in laying structural pavement layers, to make research of pavement structures in real conditions of their operation. The article studies methods for the determination of road pavement structural strength, gives the evaluation of equipment used for static and dynamic determination of pavement structural strength. In order to determine and compare the accuracy of testing results carried out by static and dynamic methods the comparative measurements were carried out on the experimental road section using four measuring devices on subgrade. Further results of the research of experimental road section, their analysis and assessment will allow to select the most suitable measuring method for each structural pavement layer.