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Colonisation et biodétérioration des bétons en milieu marin : mise au point d'essais en laboratoire et influence de la composition chimique du matériau cimentaire

Abstract : In the current context of increased world population, it is necessary to built more infrastructures to meet the increasing industrial pressure. These constructions are erected on the sea as harbors, artificial islands or tourist accommodation. Concrete is mainly used because of its low-cost and durability in the marine environment. Like any material immersed in seawater, concrete is colonized by living organisms, becoming an habitat for their development. However, seawater is a very aggressive environment towards cementitious materials; physical, chemical and biological degradations are observed with time. Nowadays, physical and chemical degradations are well understood and reported in the literature but there is a lack of knowledge concerning biological effects. The aim of this thesis is first develop an experimental device in laboratory, allowing the colonization of cementitious material by microorganisms. Relevant tools to characterize the biofilm on the material were chosen to better understand colonisation’s kinetic. Chemical analysis of material and seawater were made to evaluate the actions of the biofilm on cementitious material. Different materials were produced to study the impact of the formulation on the colonization.
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Marie-Adeline Ferrero. Colonisation et biodétérioration des bétons en milieu marin : mise au point d'essais en laboratoire et influence de la composition chimique du matériau cimentaire. Génie civil. Normandie Université, 2018. Français. ⟨NNT : 2018NORMC248⟩. ⟨tel-02066414⟩

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