Correlação entre os dados deflectométricos obtidos com viga Benkelman e Deflectômetro de Peso Leve (LWD): estudo de caso para análise do comportamento mecânico do pavimento

Abstract

This article presents a case study for reflecting on the best practices necessary for an investigation regarding the criteria required for correlations of deflection measurements of pavement using similar devices. Deflections, in addition to playing a fundamental role in assessing structural integrity and pavement performance, are one of the key pieces of information for designing reinforcements in these structures. The Benkelman Beam (BB), a well-established and commonly used deflectometric device, has its data widely used as input parameters in various pavement reinforcement methods. Given this perspective, the present article aims to analyze the feasibility of using the Lightweight Deflectometer (LWD) test, whose use has grown in recent years, and its deflection data for the same purposes as the Benkelman Beam data. In this context, for comparative data collection, this research presents the study conducted on two highways, both featuring two segments, one with hot mix asphalt (HMA) pavement and the other over compacted natural soil. Subsequently, using Excel software, a statistical analysis with regression models was conducted with the deflectometric measurements obtained in the field and compared with studies by other authors. The results indicated the impossibility of establishing a valid correlation between the two devices in this case study; however, they do allow for reflection on the essential criteria for obtaining these field data.