Development and experimental validation of an overlay mortar with biocide activity |
| |
| Affiliation: | 1. BASF Construction Chemicals, Ctra del Mig, 219, 08907, L''Hospitalet del Llobregat, Spain;2. Department of Construction Engineering, Universitat Politècnica de Catalunya, Barcelona Tech, C1, 08034, Barcelona, Spain;3. Smart Engineering Ltd., C/Jordi Girona 1-3, Parc UPC – K2M, 08034, Barcelona, Spain;4. Department of Animal Health and Anatomy, Faculty of Veterinary, Universitat Autònoma de Barcelona, Edifici V, 08193, Bellaterra, Spain;1. Universidad de Navarra, Facultad de Ciencias, Departamento de Química, MIMED Research Group, Irunlarrea, 1, 31008 Pamplona, Spain;2. Chair for Construction Chemistry, Department of Chemistry, TUM Center for Advanced PCE Studies, Technische Universität München, Lichtenbergstraße 4, Garching 85747, Germany;1. College of Mechanics and Materials, Hohai University, Nanjing 210098, China;2. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China;1. University of Minnesota Medical School, Minneapolis;2. Department of General Internal Medicine, Hennepin County Medical Center, Minneapolis, Minn;3. Department of Hematology and Oncology, Hennepin County Medical Center, Minneapolis, Minn;1. Karlsruhe Institute of Technology (KIT), Institute of Functional Interfaces, Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany;2. Hokkaido University of Science, Department of Civil and Environmental Engineering, 4-1, 7-15, Maeda, Teine-ku, 006-8585 Sapporo, Japan;3. University of Applied Sciences Karlsruhe, Institute for Prevention in Construction, Moltkestr. 30, D-76133 Karlsruhe, Germany;1. University of Novi Sad, Faculty of Technology, Bulevar cara Lazara 1, 21000 Novi Sad, Serbia;2. University of Novi Sad, Faculty of Technical Science, Trg Dositeja Obradovi?a 6, 21000 Novi Sad, Serbia;3. Slovenian National Building and Civil Engineering Institute, Dimi?eva 12, 1000 Ljubljana, Slovenia |
| |
| Abstract: | Biodeterioration of concrete by microorganism colonisation may be a problem in several structures, especially in irrigation and hydroelectric canals. The main problem in such structures is the proliferation of algae and cyanobacteria that affect the performance of the structure, increase the maintenance costs and affects its durability. A research was conducted to develop a novel cement-based material with biocide activity that can be used as an overlay mortar in existing structures, such as canals and pipes. With this aim, ten commercial biocides were evaluated in a laboratory campaign to assess the effectiveness of the compounds against the microbial colonisation of concrete. Both mono- and multicomponent formulations were designed from the commercial products, to increase their antimicrobial effect obtaining a set of biocide formulations. The formulations were submitted to a flowchart process to determine their influence on the physical properties of the concrete, evaluate the release of the actives, and their antimicrobial efficiency both before and after accelerated aging processes. During the campaign, some formulations were observed to diminish the strength of the concrete. Such behaviour was normally due to the interaction of the active with the cement hydration process. Other formulations showed a high release of active from the concrete in water, compromising the durability of the treatment. In general, monocomponent formulations did not succeed to fulfill all the requirements, thus multicomponent formulations were analysed. One studied multicomponent formulation presented particularly good results in all properties analysed. This product did not significantly change the properties of concrete and the release of active in water from the concrete was low, while the antimicrobial effects were long lasting. |
| |
| Keywords: | Biocide Mortar Cement Bioreceptivity Colonisation Algae Bacteria Fungi |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
