Journal of Shanghai University(Natural Science Edition) ›› 2022, Vol. 28 ›› Issue (4): 656-667.doi: 10.12066/j.issn.1007-2861.2275

• Research Articles • Previous Articles     Next Articles

Application of non-destructive testing technique for detecting surface detachment in cultural heritage buildings

HUANG Jizhong1(), ZHANG Yunmeng1,2, ZHANG Yue1, ZHAO Peng3   

  1. 1. Institute for the Conservation of Cultural Heritage, Shanghai University, Shanghai 200444, China
    2. School of Mechanics and Engineering Science, Shanghai University, Shanghai 200444, China
    3. Shanxi Ancient Architecture Engineering Supervision Co. Ltd., Taiyuan 030012, Shanxi, China
  • Received:2020-08-15 Online:2022-08-30 Published:2021-04-30
  • Contact: HUANG Jizhong E-mail:hjizhong@shu.edu.cn

Abstract:

Surface detachment is one of the main defects of the Shanxi Academy walls, and it can lead to the peeling of cement mortar plaster and the weathering of interior masonry structures. Thus, it is necessary to evaluate its severity before conducting detailed conservation and restoration work. In this study, manual percussion was first performed for the preliminary detection of surface detachment defect. Next, two non-destructive testing techniques, i.e. phased-array ultrasonic imaging and infrared thermal imaging, were combined to measure the scope and area of distribution in detail. The results showed that (1) all methods could reflect the surface detachment distribution to different degrees, (2) data obtained using different non-destructive techniques were comparable to some minor errors correlated with defect types and environmental factors, (3) the detachment of cement mortar plaster from the wall surface was generally severe, and its defect rating could be divided into four specific grades. The research results are useful for detecting and evaluating surface detachment in cultural heritage buildings.

Key words: detachment, non-destructive testing technique, ultrasonic imaging, infrared thermal imaging, heritage conservation

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