Influence of the intrinsic characteristics of mortars on their biofouling by pigmented organisms: Comparison between laboratory and field-scale experiments |
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| Affiliation: | 1. Ecole Nationale Supérieure des Mines de Saint Etienne, SPIN-EMSE, CNRS: UMR 5307, LGF, 158 cours Fauriel, 42023 St-Etienne, France;2. Université Lille Nord de France, 1 bis Gerges Lefèvre, 59044 Lille, France;3. Ecole Nationale Supérieure des Mines de Douai, LGCgE-GCE, 941 Rue Charles Bourseul, 59508 Douai, France;4. Université Paris Est, Centre Scientifique et Technique du Bâtiment, Direction Isolation et Revêtements, 84 avenue Jean Jaurès, Champs-sur-Marne, 77447 Marne-la-Vallée, France;5. Duy Tan University, Department of Civil Engineering, K7/25 Quang Trung, Da Nang, Viet Nam;1. CONSTRUCT-LFC, Faculty of Engineering (FEUP), University of Porto, Rua Dr. Roberto Frias s/n, 4200-465 Porto, Portugal;2. LNEC, National Laboratory for Civil Engineering, Av. do Brasil 101, 1700-066 Lisbon, Portugal;1. IMT Lille Douai, Université Lille 1, Laboratoire de Génie Civil et géo-Environnement, LGCgE EA4515, Département Génie Civil & Environnemental, 941 rue Charles-Bourseul, 59508 Douai, France;2. Université de Pau et des Pays de l''Adour, IPREM UMR CNRS 5254, IBEAS, Equipe Environnement et Microbiologie, BP 1155, 64013 Pau Cedex, France;3. Université Lille 1, Laboratoire de Génie Civil et géo-Environnement, LGCgE EA4515, Environmental Axis, Bât. SN3, 59655 Villeneuve d´Ascq, France;1. College of Civil Engineering and Architecture, Jiaxing Nanhu University, 314001, PR China;2. Jiaxing Key Laboratory of Building Energy Efficiency Technology, Jiaxing 314001, PR China;3. Research Center of Coastal Urban Geotechnical Engineering, Zhejiang University, Hangzhou, Zhejiang 310058, PR China;4. Department of Civil Engineering, Shanghai University, Shanghai 200072, PR China;1. College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, China;2. School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China;1. CONSTRUCT-LFC, Faculty of Engineering (FEUP), University of Porto, Rua Dr. Roberto Frias s/n, 4200-465 Porto, Portugal;2. LNEC, National Laboratory of Civil Engineering, Av. do Brasil 101, 1700-066 Lisboa, Portugal |
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| Abstract: | Biodeterioration of mortars by the photosynthetic microorganisms is affected by their intrinsic properties such as porosity, roughness and surface pH. The influence of these parameters was examined using an accelerated fouling test in laboratory and a natural fouling test in the real-world (in situ). Based on color measurement and image analysis, the impact of each intrinsic parameter was evaluated. The results differed from a scale to the other one. No influence of porosity was measured on the algal colonization rate in the laboratory test whereas, a high porosity seemed to increase slightly the bioreceptivity of the mortars exposed outdoor. The roughness, in both tests, promoted the microbial colonization. However, the discrimination of roughness grades was better in the laboratory test than in the in situ one. The surface pH influenced remarkably on the accelerated biofouling test but not on the in situ one. These dissimilarities resulted from the differences in experimental configurations of the two tests. |
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| Keywords: | Mortar Biofouling Intrinsic properties Laboratory test |
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