Theoretical and practical methodology for recognizing the road surface structure

Stefan Firlej

s.firlej@pollub.pl
Department of Roads and Bridges; Faculty of Civil Engineering and Architecture; Lublin University of Technology; (Poland)

Marcin Dębiński

Department of Roads and Bridges; Faculty of Civil Engineering and Architecture; Lublin University of Technology; (Poland)
https://orcid.org/0000-0002-5967-0637

Abstract

A recognition indicator of the possibility of further use of the road during transferring transport loads are changes in the condition of the road surface. If the surface condition indicates incorrect parameters of its equality, rutting, or cracks, the road durability is qualitatively assessed. In this case, the actual load capacity rating and possible reconstruction of the structure begins. Values of dynamic defl ections can be used to recognize the modulus of elasticity and thus the possibility of assessing the durability of a structure. The mechanistic method is used to dimensioning the structure due to the movement planned. It allows a fl exible approach to further construction, giving the opportunity to assess whether part or all of it should be left or apply an additional layer to meet future requirements. The elastic modulus needed for this pavement structure design method for existing layers has been recognized by identifi cation as backcalculation methodology that have been used for many years.

Keywords:

road surface, backcalculation, dynamic deflections, road durability