Abstract
This article describes a road of experimental pavement structures that was constructed in 2007 and is still in operation today. The road consists of 27 different pavement structures with the same class of pavement structure but the different type and composition of materials. The experimental pavement structures were laid on the road to the query, one traffic lane is used by loaded traffic and other – by unloaded traffic. In May, 2012 totally 320 000 ESAL’s (100 kN) passed the road. Annually – about 70 000 ESAL’s. This article gives the research results of the bearing capacity and surface characteristics of experimental pavement structures after five years of their service.
Highlights
Over the years, a significant amount of effort has been spent on developing methods to objectively evaluate the condition of pavements (Nejad, Zakeri 2011)
The experimental pavement structures were laid on the road to the query, one traffic lane is used by loaded traffic and other – by unloaded traffic
The temperature in the surface layer of the asphalt pavement structure changes during the year from –21.77 °C to +52.75 °C, the difference is more than 70 °C
Summary
A significant amount of effort has been spent on developing methods to objectively evaluate the condition of pavements (Nejad, Zakeri 2011). Rutting in asphalt pavements has become one of the major distress forms with the increase in traffic volume, tire pressure and axial load. It often happens within the first few years after opening to traffic. Vaitkus et al (2009) ascertained that the use of particular supplements in warm mix asphalt increases stiffness of the binder and at the same. The material used and the thickness of frost blanket course must ensure the required resistance to frost of road pavement structure and to increase bearing capacity of the structure, to distribute and reduce pressure to the subgrade surface. Vaitkus et al (2012) suggested the materials for a frost blanket course and recommended that when laying a frost blanket course to take into consideration bulk density and Proctor density of the material used, as well as transportation costs
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