Instrumentation of the DNER Circular Track

ABSTRACT This paper presents the instrumentation used on the Experimental Circular Track of Brazil's National Highway Department (DNER—Departamento Nacional de Estradas de Rodagem), with the purpose of studying the use of concrete (whitetopping) to resurface flexible pavements. This instrumentation was made up of six strain gauges which were imbedded in the pavement layers. The results obtained from the sensor measurements were then compared against values calculated using the computer programs: ELSYM5, DIPLOMAT, ILSL2 and KENSLABS. These comparisons yielded similar results, especially against those of programs ELSYM5 and DIPLOMAT (with full friction).