A Multi-Purpose Pavement Testing Device: Applications of the Rolling Dynamic Deflectometer and the Stationary Dynamic Deflectometer in Pavements

摘要

The Rolling Dynamic Deflectometer (RDD) capable of measuring continuous deflection profiles along pavements has been used in: (a) delineating problematic areas to be repaired, (b) identifying potential locations for reflective cracking, and (c) developing inputs for selecting a rehabilitation scheme. Unlike discrete testing methods, the RDD travels along a pavement and its continuous deflection profile provides 100% coverage along the pavement. On the other hand, the use of the RDD at a stationary mode, called as the Stationary Dynamic Deflectometer (SDD), is used for super-accelerated pavement testing (SAP). The SAP is defined as the application of one million load repetitions to a full-scale pavement system in one day and evaluates the fatigue performance of in-situ pavements. The SDD applications include: (a) evaluating rut resistance in a flexible pavement and fatigue-crack resistance in a rigid pavement and (b) estimating the remaining life of in-service pavements under heavy traffic loads. This paper introduces benefits of the RDD as a multi-purpose pavement testing device and presents three case studies using the RDD and SDD.