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R. Blab, J. Litzka, P. Girkinger:
"Verification of Pavement Structure Design on A2 Toll Motorway in Poland using Heavy Vehicle Simulator";
Report for A2 - Baudevelopment Poznan / Poland; 2002.

For the evaluation of the existing design for a semi rigid pavement of the A2 motorway at Poznan a comprehensive test program was carried out. In addition to material tests for all used pavement materials it was decided to perform field tests with accelerated loading. Therefore two test fields with the originally planed pavement construction and a pavement with reduced thicknesses of the cement treated base layers were constructed near Markowice to investigate the pavement behavior under artificial traffic load. The pavements at the test sites were instrumented with strain gauges, soil pressure cells and deflection gauges in order to assess the pavements’ response under the load and to compare these response measurements with values calculated from theoretical pavement models.
The main part of the report is dealing with the detailed data analysis of the FWD measurements and of the response measurements from the instrumented test fields that was carried out. A comprehensive methodology was developed to combine the analysis of the results of the response measurements and the results of the deflection measurements with the FWD. By back calculation from the deflection results E-modules of the pavement layers were determined which consequently were used for a forward calculation of stresses, strains and deflections within the pavement. Thus a comparison with the response measurements was possible. By means of a sensitivity analysis most realistic ranges of the E-modules of the pavement layers, especially of the cement treated base layers as the main bearing element, were determined.