The aim of this workshop is to provide an international forum for reporting progress and recent advances in micromechanics and its applications to cementitious materials.

Topics include, but are not restricted to: multiscale methods and tools, advanced experimental techniques to provide input or validation data, microstructure investigation and modeling, non destructive testing, delayed strains, swelling phenomena, strength, damage, degradation mechanisms, transport properties.

Contributions are warmly welcomed.

Abstracts should be submitted by e-mail to the technical contacts provided below.

  • Date and location:

Wednesday 29 september 2021, whole day, Teams remote meeting.

  • Practical aspects:

– Official announcement on MAI website:

https://themai.org/workshops/

– Free but mandatory registration:

https://docs.google.com/forms/d/e/1FAIpQLSfvg9P7UMYoLR0TS_RTaaB5zRlacjnO1BuQPjoodzYk_jIJzw/viewform?vc=0&c=0&w=1&flr=0

  • For more details, please contact:

– Administrative information: Liloo Moutot (liloo.moutot@edf.fr),

– Technical information: Julien Sanahuja (julien.sanahuja@edf.fr).

Concrete and cementitious materials properties and behaviors are of paramount importance to manage long term operation of civil engineering structures. Relevant material properties and behaviors are required to perform structural finite element computations and to interpret most non destructive techniques. As concrete mixes are very diverse, properties from one concrete may not be suitable for another one.

Micromechanics and, broadly speaking, homogenization techniques, allow to investigate composite materials behaviors and properties from their microstructure and micromechanisms. They form a toolbox of choice to build physics-informed models relating properties to mix design, or cross-relating several properties (for non destructive techniques based on indirect measurements, eg: measure permittivity to assess water content).

This short online course (1H30) proposes an introduction to basic principles of micromechanics and some applications to civil engineering.

Objectives :

– Get an overview of concrete civil engineering questions at EDF R&D that have been investigated through micromechanics,

– Get familiar with basic principles of micromechanics,

– Experience a demonstration of a software toolbox dedicated to estimating concrete properties and behavior.

Audience :

– Engineers and researchers in the field of civil engineering, with backgrounds in continuum mechanics and mechanics of materials.

This training is free and will be performed on line.

If you are interested on this training :

  • Date: Monday 20 september 2021
  • Time: 13h00 – 15h00 CEST
  • Free but mandatory registration:

https://docs.google.com/forms/d/e/1FAIpQLSfvg9P7UMYoLR0TS_RTaaB5zRlacjnO1BuQPjoodzYk_jIJzw/viewform?vc=0&c=0&w=1&flr=0

Morpho paste : One important starting point of micromechanical models is microstructure representation. The figure shows a 3D morphological simplification of the cement paste microstructure.

Permit paste : A classical non destructive technique to assess water content is permittivity measurement. However, this indirect approach requires a “calibration curve” relating dielectric permittivity to water content, this curve depending on the concrete at stake. The experimental process is heavily time-consuming, mainly due to the very slow drying processes. A model based on homogenization has been recently developed: it is parametrized by the mix design. The plot shows a comparison to experimental measurements on a cement paste.