A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Nondestructive evaluation of concrete structures. A case study in detailed inspection using 24-year-old reinforced concrete
Deterioration observed in concrete structures has clearly highlighted the need for periodic inspection and maintenance. The Japan Society of Civil Engineers has recently published specifications for the maintenance of concrete structures, which lay down the framework for initial, periodic and detailed inspection. A 3 m long piece from a 1.2 m high sidewall removed from its location during a highway realignment was moved to the laboratory and extensively studied using various nondestructive methods. This paper presents the results obtained in the framework of maintenance procedure that could be followed in the inspection and maintenance of structures. The need to develop appropriate nondestructive testing methods for existing concrete structures cannot be over-emphasized. In addition to visual inspection, various new methods were used with the view to determine their effectiveness and range of applicability. Within the limitations of the results and the experimental conditions, it can be said that methods such as digital photography and thermography can be used to effectively compliment visual inspection and the records used for comparison at the time of subsequent inspection, without having to get physically close to the structure. Methods such as Schmidt rebound hammer, radar scanning, ultrasonics, natural potential, etc. could provide valuable information but can be used only in cases when the structure is physically accessible, or an appropriate arrangement is made. However, the results from the present investigation highlight the need for additional work before these methods can be effectively used as part of a comprehensive strategy for detailed inspection.
Nondestructive evaluation of concrete structures. A case study in detailed inspection using 24-year-old reinforced concrete
Deterioration observed in concrete structures has clearly highlighted the need for periodic inspection and maintenance. The Japan Society of Civil Engineers has recently published specifications for the maintenance of concrete structures, which lay down the framework for initial, periodic and detailed inspection. A 3 m long piece from a 1.2 m high sidewall removed from its location during a highway realignment was moved to the laboratory and extensively studied using various nondestructive methods. This paper presents the results obtained in the framework of maintenance procedure that could be followed in the inspection and maintenance of structures. The need to develop appropriate nondestructive testing methods for existing concrete structures cannot be over-emphasized. In addition to visual inspection, various new methods were used with the view to determine their effectiveness and range of applicability. Within the limitations of the results and the experimental conditions, it can be said that methods such as digital photography and thermography can be used to effectively compliment visual inspection and the records used for comparison at the time of subsequent inspection, without having to get physically close to the structure. Methods such as Schmidt rebound hammer, radar scanning, ultrasonics, natural potential, etc. could provide valuable information but can be used only in cases when the structure is physically accessible, or an appropriate arrangement is made. However, the results from the present investigation highlight the need for additional work before these methods can be effectively used as part of a comprehensive strategy for detailed inspection.
Nondestructive evaluation of concrete structures. A case study in detailed inspection using 24-year-old reinforced concrete
Zerstörungsfreie Bewertung von Betonstrukturen. Eine Fallstudie zur detaillierten Prüfung an 24 Jahre altem Stahlbeton
Watanabe, S. (author) / Misra, S. (author) / Uomoto, T. (author)
2003
8 Seiten, 10 Bilder, 3 Tabellen, 5 Quellen
(Nicht paginiert)
Conference paper
Storage medium
English
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