Evaluation of the Dynaflect for the Non-Destructive Testing of Portland Cement Concrete Pavements

摘要

The report presents the results obtained from portland cement concrete pavement testing with the Dynaflect, an apparatus developed for the deflection testing of pavements under a dynamic load. Essentially the device was tested to determine if deflection measurements from dynamic loadings could be correlated with deflection measurements from static loadings, and thereby relate to allowable loadings on portland cement concrete pavement. Also of interest during the investigation was the performance of concrete pavement at joints to determine load transfer between slabs. The detection of cracking where not visible on the pavement surface, and the extent of pavement deterioration where visible cracks existed were matters for investigation. The results of the investigation indicated that: Correlation of deflections from dynamic and static loading appear feasible particularly for pavements on clay subgrades. Differences in load transfer at joints could be detected. Indications of slab integrity can be obtained. (Author)