Etude de la qualité du piégeage des matières organiques par la matrice cimentaire vis-à-vis de la lixiviation

Abstract : Evidence that materials used by the industry are not damageable for the environment has become a major issue. In cement industry, organic admixtures such as grinding aids or superplasticizers ar widely used. In particular, they constitute cementitious materials in concrete contacting water like in water pipes and water tower. It is therefore essential to test whether these organic coumpounds are enventually dissolved into water by leaching. In this aim, five different dynamic leaching tests were developed and applied to a CEM I cement paste formulated with organic admixtures. In paralell, highly sensitive analytical methods based on MALDI-TOF and Py-THM-MS mass spectrometry techniques were designed in order to detect traces of leached superplasticizers or grinding aids. The dynamic leaching tests coupled to mass spectrometry allowed us to detect the presence of organic compounds in the leachate, and to better understand the mechanisms involved in the trapping of additives into a cement paste
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Cyril Guerandel. Etude de la qualité du piégeage des matières organiques par la matrice cimentaire vis-à-vis de la lixiviation. Autre. Université Paul Verlaine - Metz, 2009. Français. ⟨NNT : 2009METZ030S⟩. ⟨tel-01749043⟩

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