Stabilization of the subsoil and leveling of concrete paving slabs

Abstract: In the process of using airport pavements, destructive processes of concrete slabs caused by operational loads and environmental factors are observed. One of the most common damages to concrete surfaces is thresholds (faults) - vertical displacements of the edges of the slabs or displacements on the cracks of the slabs, resulting from damage to the subsoil or foundation. Performing periodic inspections of the technical condition of the pavement allows you to monitor the changes taking place and at the same time plan repairs, which is associated with the selection of appropriate materials for their implementation. This article is devoted to the issue of stabilization and leveling of concrete pavement slabs in the low-pressure injection technology with the use of specialized injection materials (resins). The technology of board re-leveling is used in places of settlement, permanently strengthening the subsoil or substructure, as well as allowing to restore the required parameters of surface evenness. The article presents the results of laboratory tests as well as the results of field tests carried out before and after the injection works, based on the example of works carried out at one of the airport facilities in Poland. The article presents, among others the results of the load-bearing and evenness tests of the pavement and the results of the tests with the use of GPR. The presented technology belongs to non-invasive repair solutions and short-term works. Keywords: concrete pavement; Geotechnical injections; Keystroke plates