Infrastructure inspection and monitoring activities are needed to check and keep operating an infrastructure during all the steps of its entire life cycle. Road infrastructures, especially when built on a structure, like a bridge or a multi-level parking area, need to be monitored and inspected to check and to evaluate damages, structural integrity, and their causes. This paper focuses on a real-world application constituted by a two-level car park serving a shopping centre in Italy: the first storey at ground level, built as a traditional road pavement, the second storey at 2,5 m above the ground level, composed by a steel structure (columns and beams), a coupled steel-concrete deck and guss-asphalt layer. An impermeable synthetic resin was spread over the concrete slab. The pavement of the second storey showed some defects and damages already at the end of the construction phase, without a clear origin. The aim of the work is to propose the use of non-destructive and destructive technologies, as inspection and monitoring activities, to detect defects, define causes and propose maintenance solutions. The authors conducted several in situ- and in laboratory-tests on the pavement and its materials (such as infrared thermography, asphalt voids, stripping test, penetration and ring&ball tests, granulometric analysis, scanning electron microscope, Fourier transform infrared spectroscopy, differential scanning calorimetry, etc.). The results of these tests indicated that the pavement defects are linked to a set of wrong practices during the construction phase and design errors. The authors found that the main pavement damages were caused by the not heat-resistant resin, that was placed in contact with the high heat during guss-asphalt laying. The authors proposed to remove the layers of guss-asphalt and resins, to replace them with the correct type of waterproofing resin resisting to the high heat of the guss-asphalt.
Infrastructure inspection methodologies to define correct maintenance activities. A two-level road parking structure case study in Italy
Marco Pasetto;Giovanni Giacomello
;Andrea Baliello
2025
Abstract
Infrastructure inspection and monitoring activities are needed to check and keep operating an infrastructure during all the steps of its entire life cycle. Road infrastructures, especially when built on a structure, like a bridge or a multi-level parking area, need to be monitored and inspected to check and to evaluate damages, structural integrity, and their causes. This paper focuses on a real-world application constituted by a two-level car park serving a shopping centre in Italy: the first storey at ground level, built as a traditional road pavement, the second storey at 2,5 m above the ground level, composed by a steel structure (columns and beams), a coupled steel-concrete deck and guss-asphalt layer. An impermeable synthetic resin was spread over the concrete slab. The pavement of the second storey showed some defects and damages already at the end of the construction phase, without a clear origin. The aim of the work is to propose the use of non-destructive and destructive technologies, as inspection and monitoring activities, to detect defects, define causes and propose maintenance solutions. The authors conducted several in situ- and in laboratory-tests on the pavement and its materials (such as infrared thermography, asphalt voids, stripping test, penetration and ring&ball tests, granulometric analysis, scanning electron microscope, Fourier transform infrared spectroscopy, differential scanning calorimetry, etc.). The results of these tests indicated that the pavement defects are linked to a set of wrong practices during the construction phase and design errors. The authors found that the main pavement damages were caused by the not heat-resistant resin, that was placed in contact with the high heat during guss-asphalt laying. The authors proposed to remove the layers of guss-asphalt and resins, to replace them with the correct type of waterproofing resin resisting to the high heat of the guss-asphalt.
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