[Todos] Oferta de beca doctoral en el Institut Laue-Langevin, Grenoble, Francia

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The ISTerre (CNRS & University of Grenoble Alpes) and the Institut
Laue-Langevin (ILL, Grenoble, France), jointly invite applications for a
three-year PhD programme focusing on the 
 
STRUCTURE AND DYNAMICS OF WATER IN ORDINARY PORTLAND AND LOW CO2 CEMENTSÂ 
Cement is the single most used material in the world, but despite many
centuries of intensive usage and an ever-increasing worldwide demand, many
physico-chemical fundamental questions regarding the cement setting process
remain elusive. During this process different hydrates nucleate and grow,
of which calcium silicate hydrates (C-S-H) is the most important binding
phase. C-S-H is indeed the key compound controlling the final cement
properties, such as strength and durability. Although a large deal of
research effort has been devoted to the study of C-S-H, its poorly
crystalline character has made it inherently difficult to fully
characterize it. Moreover, the presence of aluminate phases both in
ordinary Portland cement and in new low-CO2 emissions cement formulations
result in Al-substituted C-A-S-H. Whereas much effort has been put in
understanding the atomic structure of these phases, both the structure and
diffusion of water through their pores remain poorly understood.
 
Understanding water organization in the C-S-H phase is not only
 important for the setting behavior, but also because water plays a key
role in the dissolution-recrystallization and carbonation processes which
are the main cause of the loss of cement strength. Moreover, water
diffusion in C-S-H nanopores is important to understand the exchange of
other ions in pollutant removal or in the context of nuclear waste storage.
 
In this Ph.D. project, the atomic structure of C-(A)-S-H, and the
structure and dynamics of water in the different pores of these materials
will be studied using a combination of neutron scattering techniques,
including neutron pair distribution function analyses and inelastic neutron
scattering, with synchrotron X-ray scattering and laboratory-based methods
such as water adsorption isotherms, infrared spectroscopy or
thermogravimetric and calorimetric analyses. We are looking for a motivated
candidate with a background in physics, materials science, or chemistry,
with fluency in English, and a strong motivation to work in an
international environment.
 
The PhD project will be located in Grenoble (France), at the ILL, and at
the ISTerre laboratory (campus St. Martin d’Heres), in close
collaboration with BRGM (Orleans, France). The successful candidate will be
employed for a period of up to three years, with a gross salary of around
2350 €/month, together with other benefits depending on the student’s
social status (for more details see:
http://www.ill.eu/science-technology/phd-students/phd-recruitment/phd-work-at-the-
ill/). A team of experts, including the geochemistry team at ISTerre, and
interactions with experts from BRGM (French Geological Survey, Orleans),
will supervise the work of the PhD student.
 
Applicants should have a degree in a relevant physics, chemistry or
materials science discipline. Academic knowledge of condensed matter
physics will be appreciated. The application file should contain a detailed
CV, copies of the university marks (Master level), a motivation letter and
the names and contact information of at least two referees.
 
Supervisors: Alejandro Fernandez-Martinez, ISTerre (CNRS & Univ. of
Grenoble Alpes), Alexander Van Driessche (CNRS & Univ. of Grenoble Alpes)
and Gabriel J. Cuello, ILL (Grenoble).
 
Contact information:
 
Alejandro Fernandez-Martinez, (+33) 4 76 63 51 97,
alex.fernandez-martinez en univ-grenoble-alpes.fr Alexander Van Driessche,
(+33) 4 76 63 51 94, alexander.van-driessche en univ-grenoble-alpes.fr Gabriel
J. Cuello, (+33) 4 76 20 76 97, cuello en ill.fr
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