Investigation of the creep of cementitious materials by indentation
Event details
| Date | 17.03.2014 |
| Hour | 13:15 |
| Speaker |
Matthieu Vandamme, École des Ponts ParisTech, France |
| Location | |
| Category | Conferences - Seminars |
Concrete creeps (i.e., slowly deforms under constant load) over decades, at a pace that can be detrimental to the lifespan of civil engineering structures. However, in spite of decades of research, the origin of this viscous behavior still remains unclear. Here we use the indentation technique to study this creep of cementitious materials over a variety of length scales. The indentation technique is a handy contact mechanical test that consists in pushing a probe of known geometry and mechanical properties onto the surface of the material to be tested and enables to measure -- among others -- the creep properties of the indented material. We compare minutes-long microindentation creep experiments on cement paste with years-long macroscopic uniaxial creep experiments on concrete: we thus show that the indentation technique enables to measure the rate of long-term creep of cementitious materials orders of magnitude faster than conventional macroscopic testing. We also apply nanoindentation to measure the creep properties of micrometric phases of calcium silicate hydrates (C-S-H), which are the 'glue' of cement paste and are mostly responsible for the viscous behavior of this latter: this study and an analogy with the viscous behavior of soils serve as a basis to discuss the origin of creep.
References: M. Vandamme, F.-J. Ulm, Nanoindentation investigation of creep properties of calcium silicate hydrates. Cement and Concrete Research 52: 38-52 (2013). Q. Zhang, R. Le Roy, M. Vandamme, B. Zuber, Long-term creep properties of cementitious materials: Comparing microindentation testing with macroscopic uniaxial compressive testing. Cement and Concrete Research 58: 89-98 (2014).
Bio: Curriculum
2008 - now : Researcher at Laboratoire Navier, Ecole des Ponts ParisTech, Université Paris-Est, Champs-sur-Marne, France
2004 - 2008 : PhD at Massachusetts Institute of Technology, Cambridge, MA. Thesis on : The nanogranular origin of concrete creep : A nanoindentation investigation of microstructure and fundamental properties of calcium-silicate-hydrates
2002-2003 : M.S. at Ecole des Ponts ParisTech, Champs-sur-Marne, France ; M.Eng. in civil engineering at Ecole des Ponts ParisTech, Champs-sur-Marne, France
1999-2002 : Bachelor at Ecole Polytechnique, Paris, France
Research interests
Mechanics and physics of porous solids
Cementitious materials and geomaterials
Adsorption-induced deformation
Nanoindentation technique
Computed X-ray microtomography
References: M. Vandamme, F.-J. Ulm, Nanoindentation investigation of creep properties of calcium silicate hydrates. Cement and Concrete Research 52: 38-52 (2013). Q. Zhang, R. Le Roy, M. Vandamme, B. Zuber, Long-term creep properties of cementitious materials: Comparing microindentation testing with macroscopic uniaxial compressive testing. Cement and Concrete Research 58: 89-98 (2014).
Bio: Curriculum
2008 - now : Researcher at Laboratoire Navier, Ecole des Ponts ParisTech, Université Paris-Est, Champs-sur-Marne, France
2004 - 2008 : PhD at Massachusetts Institute of Technology, Cambridge, MA. Thesis on : The nanogranular origin of concrete creep : A nanoindentation investigation of microstructure and fundamental properties of calcium-silicate-hydrates
2002-2003 : M.S. at Ecole des Ponts ParisTech, Champs-sur-Marne, France ; M.Eng. in civil engineering at Ecole des Ponts ParisTech, Champs-sur-Marne, France
1999-2002 : Bachelor at Ecole Polytechnique, Paris, France
Research interests
Mechanics and physics of porous solids
Cementitious materials and geomaterials
Adsorption-induced deformation
Nanoindentation technique
Computed X-ray microtomography
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Practical information
- General public
- Free
Organizer
- IMX Seminar Series