| People | Locations | Statistics |
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| 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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Govin, Alexandre
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (30/30 displayed)
- 2022Effect of different retarders and their combination with superplasticizer on the properties of CSA
- 2021Effect of Citric Acid and Polycarboxylate Superplasticizers (PCE) on Hydration and Rheology of Sulfoaluminate Cement
- 2019Hydration and rheology of sulfoaluminate cements (CSA) in presence of polycarboxylate superplasticizers (PCE) and citric acid
- 2019Combination of superplasticizers with hydroxypropyl guar, effect on cement-paste propertiescitations
- 2018Hydration and rheology of sulfoaluminate-belite cements (SAC) in presence of polycarboxylate superplasticizers (PCE) and citric acid
- 2018Impact of a thin coating layer of calcium aluminate and sulfoaluminate cements on algal biofouling
- 2017Experimental study of self-heating phenomenon at the reactor-scale. Safety assessment of a fixed-bed filled with torrefied wood chips
- 2017Effect of guar gum derivatives combined with superplasticizers on properties of portland cement-pastes
- 2017Combination of guar gum derivatives and superplasticizers, impact on properties of Portland cement-pastes
- 2016Experimental study of self-heating phenomena during torrefaction of spherical wood particles
- 2016Development of treatment to prevent the algal biofouling
- 2016Modification of water retention and rheological properties of fresh state cement-based mortars by guar gum derivativescitations
- 2015Impact of Guar Gum Derivatives on Properties of Freshly-Mixed Cement-Based Mortars
- 2015Effect of the Chemical Composition of Building Materials on Algal Biofouling
- 2015Modification of fresh state properties of Portland cement-based mortars by guar gum derivatives
- 2015Effect of Guar Gum Derivatives on Fresh State Properties of Portland Cement-Based Mortars
- 2014Influence of the chemical composition of mortars on algal biofouling
- 2014Lifetime durability of bio-based composites
- 2014Development of an accelerated test of fungal biodeterioration. Application to calcium aluminate cements
- 2014Synthesis and Fluidization of Wood Powders Application to biofuel production
- 2014Influence of hydroxypropylguars on rheological behavior of cement-based mortarscitations
- 2013NMR investigations of water retention mechanism by cellulose ethers in cement-based materials
- 2012Nuclear magnetic relaxation dispersion investigations of water retention mechanism by cellulose ethers in mortarscitations
- 2010Energy requirement for fine grinding of torrefied woodcitations
- 2009Effect of cellulose ethers on water retention in freshly-mixed mortars
- 2009Effect of torrefaction on grinding energy requirement for thin wood particle production
- 2009Influence of cellulose ether particle size on water retention of freshly-mixed mortars
- 2008Water transport in freshly-mixed mortars containing cellulose ethers
- 2007Study of efflorescence forming process on cementitious materials // Etude du processus de formation des efflorescences sur des matériaux cimentaires
- 2007Structural transformations of bioactive glass 45S5next term with thermal treatmentscitations
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.