| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Lors, Christine
IMT Nord Europe
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (14/14 displayed)
- 2022Methodological approaches for the structural, chemical, and microbial analysis of microbial biofilms developed on the surface of cementitious materials: Overview and future prospectscitations
- 2021Insights into the local interaction mechanisms between fermenting broken maize and various binder materials for anaerobic digester structurescitations
- 2021Biodeterioration kinetics and microbial community organization on surface of cementitious materials exposed to anaerobic digestion conditionscitations
- 2020Optimization of the formulation of an original hydrogel-based bone cement using a mixture designcitations
- 2020Application de la biocicatrisation à la réparation des micro-fissures au sein d’enceintes de réacteurs nucléairescitations
- 2018Biodeterioration of mortars exposed to sewers in relation to microbial diversity of biofilms formed on the mortars surfacecitations
- 2018Biodeterioration of cementitious materials: interactions environment – microorganisms – materials
- 2018Impact of a thin coating layer of calcium aluminate and sulfoaluminate cements on algal biofouling
- 2018Biodeterioration of mortars in sewers: relation with microbial diversity of biofilms
- 2017Monitoring crack movement in polymer-based self-healing concrete through digital image correlation, acoustic emission analysis and SEM in-situ loadingcitations
- 2017FORMULATING AND OPTIMIZING THE RHEOLOGICAL PROPERTIES OF A COMPOSITE BONE CEMENT USING MIXTURE DESIGN
- 2016Development of treatment to prevent the algal biofouling
- 2015Effect of the Chemical Composition of Building Materials on Algal Biofouling
- 2014Influence of the chemical composition of mortars on algal biofouling
Places of action
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document
Development of treatment to prevent the algal biofouling
Abstract
Colonization by microorganisms is often observed on building materials and the aesthetic problems caused by this proliferation lead to high maintenance and repair costs. Curative and preventive methods have been developed. Nowadays, biocides are the most common treatment used against biocolonization. Their efficiency is, however, highly dependent on concentrations of active substances and therefore goes hand in hand with their environmental toxicity. It appears necessary to develop more environmentally friendly methods. Previous studies in our laboratory were dedicated to the study of the colonization of mortar surface by algae both in accelerated and <i>in situ</i> tests. The results showed that intrinsic characteristics of cement based mortars, such as porosity, roughness and surface pH, as well as chemical composition of the cement, affected algal fouling. A slowdown in microbial growth on calcium aluminate cement (CAC) based mortars was notably observed. Taking these results into account, the aim of the present study is the development of preventive treatments based on CAC without adverse effects on the environment. We are working on a CAC based coating applied in a thin layer of 1mm on the surface of a cementitious substrate. The objective is to maintain the slowing effect of CAC on microbial growth while reducing costs by decreasing the amount of CAC used, since it is only applied at the mortars surface. In order to remain free of the variables linked to their intrinsic properties, a single formulation of substrate (mortar) based on Portland cement (CEMI, 52,5N, Holcim) was used as reference. The bioreceptivity of the mortars with the CAC based coating is characterized by image analysis during accelerated tests and compared with reference mortars. The experiment consists in periodically sprinkling an algal suspension on top of mortar samples inclined at 45° in a glass chamber. The green algae used in this study, which have been selected thanks to their representativeness, are <i>Klebsormidium flaccidum</i>. The addition of nanoparticles in the coating will be considered. The aim would be to insert antimicrobial substances (such as TiO<sub>2</sub>, silver or copper nanoparticles) on the surface of mortars while maintaining the CAC efficiency. One of the main issues of this process would be to protect the nanoparticles from leaching.