Evaluating concrete surfaces using an image analysis process |
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| Affiliation: | 1. LMDC – INSA/UPS Département de Génie civil, 135 avenue de Rangueil, 31077 Toulouse Cedex 04, France;2. GTM Construction, 61 Avenue Jules Quentin, 92000 Nanterre, France;1. College of Civil Engineering and Architecture, Guilin University of Technology, 541004 Guilin, China;2. College of Civil Engineering and Architecture, Guangxi University, 100 University Road, Nanning, Guangxi 530004, China;3. Department of Civil and Environmental Engineering, Michigan Technological University, 1400 Townsend Dr., Houghton, MI 49931, USA;1. IMT Lille Douai, Univ. Lille, EA 4515 – LGCgE – Laboratoire de Génie Civil et GéoEnvironnement, Département Génie Civil & Environnemental, F-59000 Lille, France;2. Faculty of Engineering, University Of Balamand, UOB, Al Koura, Lebanon;3. Laboratoire de Chimie Physique des Matériaux (LCPM/PR2N), EDST, Université Libanaise, Faculté des Sciences II, Département de Chimie, Fanar, Lebanon;1. LEMIT: Laboratorio de Entrenamiento Multidisciplinario para la Investigación Tecnológica, CICPBA, Calle: 52 e/ 121 y 122, B1900AYB La Plata, Buenos Aires, Argentina;2. CONICET: Consejo Nacional de Investigaciones Científicas y Técnicas, Argentina;3. UTN-FRLP: Universidad Tecnológica Nacional-Facultad Regional La Plata, Av.60 esq. 124 s/n, B1900AYB La Plata, Buenos Aires, Argentina;4. CIDEPINT: Centro de Investigación y Desarrollo en Tecnología de Pinturas, CICPBA: y CONICET, Calle: 52 e/ 121 y 122, B1900AYB La Plata, Buenos Aires, Argentina;1. College of Civil Engineering & Architecture, Zhejiang University of Technology, Hangzhou 310023, China;2. Key Laboratory of Civil Engineering Structures & Disaster Prevention and Mitigation Technology of Zhejiang Province, Hangzhou 310023, China |
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| Abstract: | This study concerns the assessment of non-coated concrete surfaces in civil engineering structures and buildings. Imaging is used as an objective tool for evaluation of the surfaces. Because images of surfaces taken under different conditions of illumination are difficult to compare, this paper presents a method suggested by the building firm GTM Construction and the laboratory LMDC for obtaining images of luminance L1 simulated for one standard illuminant (D65). Concrete surfaces can be qualified with respect to uniformity of tint and distribution of surface bubbles. The process described is based on image analysis. Not only can the results be compared with current standards, but the method also gives access to additional, accurate information such as the distribution of defects and the size of surface bubbles. This method is already applied on building sites for experts’ assessments and in the laboratory for the study of the parameters influencing surface quality. |
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