Non-destructive investigation of a historic English lighthouse

Colston, Belinda and Watt, David (2008) Non-destructive investigation of a historic English lighthouse. In: 1st International Conference on Construction Heritage in Coastal and Marine Environments: damage, diagnostics, maintenance and rehabilitation, 28–30 January 2008, Lisbon, Portugal.

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Abstract

Non-destructive investigation of an eighteenth-century English lighthouse, undertaken as part of the European Commission Culture 2000 PHAROS historic lighthouses project, has provided an insight into the construction and condition of this significant structure. A preliminary building survey raised a series of questions, including confirmation of construction beneath external and internal
render layers, changes in construction over the height of the structure, the absence/presence of metallic cramps or other reinforcement, and the penetration of stone cantilevered steps and structural members into the wall thickness. It was also necessary to know whether there were
voids within the wall thickness, and if there was separation of the external and internal render layers from the substrate. Non-destructive investigation of sample areas of the lighthouse was undertaken using a combination of impulse radar, dynamic impedance, thermography, and pulsed ultrasound, with selective opening up to confirm survey data. These techniques have provided a useful means of determining the construction and condition of a historic lighthouse, although the value of such work lies as much with the interpretation of data as with the application of the correct techniques.

Item Type:Conference or Workshop Item (Presentation)
Additional Information:Non-destructive investigation of an eighteenth-century English lighthouse, undertaken as part of the European Commission Culture 2000 PHAROS historic lighthouses project, has provided an insight into the construction and condition of this significant structure. A preliminary building survey raised a series of questions, including confirmation of construction beneath external and internal render layers, changes in construction over the height of the structure, the absence/presence of metallic cramps or other reinforcement, and the penetration of stone cantilevered steps and structural members into the wall thickness. It was also necessary to know whether there were voids within the wall thickness, and if there was separation of the external and internal render layers from the substrate. Non-destructive investigation of sample areas of the lighthouse was undertaken using a combination of impulse radar, dynamic impedance, thermography, and pulsed ultrasound, with selective opening up to confirm survey data. These techniques have provided a useful means of determining the construction and condition of a historic lighthouse, although the value of such work lies as much with the interpretation of data as with the application of the correct techniques.
Keywords:Historic building, lighthouse, non-destructive testing
Subjects:K Architecture, Building and Planning > K250 Conservation of Buildings
F Physical Sciences > F200 Materials Science
Divisions:College of Science > School of Life Sciences
ID Code:5108
Deposited By: Belinda Colston
Deposited On:27 Apr 2012 12:42
Last Modified:27 Apr 2012 12:42

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