Actualités > PhD position - Understanding of “cement/recycled glass powder” interactions in cementitious materials : experimental investigations and probabilistic modelling

Du 1er octobre 2022 au 30 septembre 2025

Topic :

Understanding of “cement/recycled glass powder” interactions in cementitious materials : experimental investigations and probabilistic modelling.
Context : Among the different constituents of cement-based materials, cement represents the main source of environmental impacts, particularly greenhouse gas emissions. Therefore, partial substitution of cement with additions, industrial by-products or materials from inert waste such as recycled glass powder, leads to low-carbon cementitious materials. Reducing the amount of cement, in favor of recycled glass powder, contributes to reducing the environmental impact of cementitious materials and to recovering a material from inert waste. This recovery limits both the systematic use of natural resources and landfill. However, the use of recycled glass powder remains limited mainly due to the absence of a normative framework regulating its use in cementitious materials. This can be explained by the lack, in the scientific literature, of studies and reliable data on materials incorporating such a mineral addition. In fact, there is still some ambiguity around the real role of recycled glass powder in modifying properties and performance of cementitious materials.

Objective and approach :

The objective of this study is to investigate, through experimental measurements combined with deterministic and probabilistic modeling, the effect of incorporation of recycled glass powder on some properties and performances of cementitious materials. This consists in understanding the physico-chemical phenomena reflecting the interactions between cement and different chemical natures, morphologies and reactivities of the recycled glass powder. The properties and performances analyzed mainly concern consistency, hydration, microstructure, alkali-silica reaction, durability and mechanical properties. Uncertainties associated with these physico-chemical phenomena and those related to the properties and performances will be characterized by probabilistic studies based on experimental data and models. In addition, auscultations at the microscopic scale combined with numerical modelling, mainly microstructure models based on three-dimensional reconstruction of SEM images, would allow characterizing microstructures. Such an approach would serve to : (i) reduce epistemic uncertainties related to the lack of knowledge of cement/glass powder interactions, (ii) predict some properties and performances of materials, mainly those governing the transfer of aggressive agents, and (iii) understand the mechanisms of transfer of uncertainties for the development of innovative cementitious materials.

Localization :

Laboratory of Engineering Sciences for the Environment – LaSIE UMR 7356 CNRS La Rochelle University.

Duration :

October 1st, 2022 – September 30th, 2025.

Profile :

Master’s Degree (M2) and/or Engineer’s Degree in Civil Engineering.

Skills :

Good knowledge of cementitious materials, experimental and modeling tools (python™, COMSOL Multiphysics®, CEMHYD3D). Good capacity for teamwork and oral and written communication in French and English.

Application :

Send by e-mail a resume, a cover letter, academic grades and Master dissertation (if finalized) of the last training (Master/Engineer), 2 letters of recommendation and a certificate of the English level (if available).

Deadline :

May 31st, 2022.

Contact :

Emilio Bastidas-Arteaga (ebastida@univ-lr.fr)

publie le vendredi 8 avril 2022