Development of low-carbon cementitious materials - Université de Nantes/IMN & Université de Sherbrooke (Canada)

Nowadays, the building material industry faces both the imperatives of limiting the consumption of natural resources and limiting nuisances and discharges. Thus, over the past twenty years, there has been a very strong resurgence of interest from the international scientific community in the development of new binding matrices in order to meet the strong demand in the construction industry. We can thus cite a significant development of research in connection with magnesian cements, sulphoaluminous cements, alkali-activated cements (geopolymers), or even hybrid Portland / geopolymer cements.

Yet one of the most promising avenues is to develop mixed cements, composed of Portland cement and additives from industry (slag and fly ash) or natural (clay or waste rock). Moreover, it is in the use of composed cements that technological developments are most advanced, with in particular the development of LC3 cements made up of clinker, limestone and metakaolin (calcined clay). These have higher physical strengths than current cements and an environmental footprint reduced by 30 to 40% compared to traditional CEM I.

Thus, the development of new binder involves research into new alumino-silicate resources as a partial substitute for clinker in Portland cement, in order to contribute to the development of “Low carbon cements”. It is not a question of reinventing a technology but of continuing the studies in progress in the search for these sources (glass powder, calcined clays, mining waste) and to optimize the synergy between the various compounds in the development of new matrices. In particular, scaling through in situ tests will be proposed. 

This work will implement a multi-scales and multi-techniques approaches with the main idea of finely studying the characteristics of the cement phases in the presence of these alumino-silicate compounds, their reactivity /evolution with time (solid NMR, XRD, ATG, etc.), but also to make the link with the mechanical properties, considering their microstructural properties (SEM and NIS-QEDS), their mechanical properties and the study of concrete durability.

This thesis project comes under joint supervision between the Nantes university (Institut des Matériaux Jean Rouxel), Gustave Eiffel university (Nantes campus) and the University of Sherbrooke in Canada (Québec). The student will spend half of their thesis in France devoted to the physico-chemical analysis of materials and the other half in Canada, studying the mechanical behaviour of materials.

Date de publication :  6 Mai 2021
Lieu :  Université de Nantes/IMN & Université de Sherbrooke (Canada)
Document : 
Sujet thèse IMN_UdS-2021.pdf

Postuler à cette offre :

*Nom :
*Prénom :
*Téléphone :
Email invalide !
*Email :
Email invalide !
Votre message :
Joindre un document pdf ou .doc :
* Informations obligatoires

 

retour à la liste des offres de thèse
Accueil
Présentation du GFALes adhérents du GFA Les membres du CA Adhérer
Des réponses à vos questions
FormationsMaster National Argiles Master Erasmus Mundus
Actualités
Offres en cours Emploi Thèses
Contact