Please refer to JobSuchmaschine in your application
PhD students (chemistry, materials sciences, earth sciences, civil & environmental engineering) in the field of cement chemistry 100%
The Laboratory for Concrete and Construction Chemistryis seeking for two
Cement is the most used building material and its production causes 5-8% of global man-made CO2. One of the possibilities to decrease these emissions, which are mainly due to the decarbonation of limestone, is to replace a part of the cement by supplementary cementitious materials (SCMs). However, the industrial application of SCMs is hindered by the fact that such novel, low CO2 cementitious materials have different chemical compositions and lead to the formation of different hydrates. Calcium silicate hydrate (C-S-H) is the main hydrated phase in ordinary Portland cement and undergoes a drastic modification in the presence of SCMs rich in silica. The uptake of aluminum and alkali in C-S-H is increased. The goal of the present project will be to understand the different mechanisms involved in the aluminum and alkali uptake.
In the 1st PhD project, C-S-H phases will be synthesized in the laboratory under different conditions. Their composition will be investigated by X-ray diffraction, thermogravimetric analysis and advanced nuclear magnetic resonance spectroscopy (partially at Aarhus University, Denmark). In addition, the composition and the pH of the liquid phase will be determined.
In the 2ndPhD project, the sorption isotherms for aluminum on C-S-H (using ICP-MS) and the formation of aqueous complexes will be studied by titration techniques and thermodynamic modelling.
The PhD projects will be carried out in cooperation with Prof. K. Scrivener, EPFL and Prof. C. Ludwig, EPFL and will start early in 2017. We are looking for students with a master in Chemistry, Materials Science, Earth Sciences, or related fields, who have good verbal and written knowledge in English. A strong background in materials science or inorganic chemistry and good skills in design and operation of experimental set-ups are an advantage. If you are motivated to perform scientific studies in an interdisciplinary group, then you are the person we are looking for.
For further information please contact Dr. Barbara Lothenbach, +41 58 765 47 88, email@example.com. Applications must be accompanied by a short CV and university certificates.