3D multi-scale modelling of mechanical behaviour of sound and leached mortar

Journal Article · Tue Apr 15 04:00:00 EDT 2008 · Cement and Concrete Research

DOI:https://doi.org/10.1016/j.cemconres.2007.11.015· OSTI ID:21033073

Bernard, F ^[1]; Prince, W ^[1]

---

1. Laboratoire de Genie Civil et Genie Mecanique (LGCGM), Institut National des Sciences Appliquees, 20 Avenue des Buttes de Coesmes, 35043 Rennes Cedex (France)

A 3D multi-scale modelling of mechanical properties of cement-based materials approach is presented. The proposed approach provides a quantitative means to estimate and predict the mechanical properties of cement-based materials taking into account the eventual changes in the micro-structure. Two numerical tools are combined. First, the NIST's 3D model (CEMHYD3D) is used to generate a realistic 3D Representative Volume Element of cement-based materials at different scales. Then, multi-scale simulations are performed by using the FE software Abaqus for the calculation of the mechanical behaviour. The approach is then successfully applied to a specific mortar in order to determine firstly its mechanical behaviour under tensile and compression loadings and secondly the evolution of its Young's modulus under the leaching phenomenon. This evolution is a key parameter since the leaching may be critical for the mechanical integrity of concrete structures such as radioactive waste storage systems in which cement-based materials may be largely used. The numerical results of the modelling are consistent with the experimental ones.

• OSTI ID: 21033073
• Journal Information: Cement and Concrete Research, Journal Name: Cement and Concrete Research Journal Issue: 4 Vol. 38; ISSN 0008-8846; ISSN CCNRAI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CEMENTS
COMPRESSION
COMPUTER CODES
CONCRETES
LEACHING
MICROSTRUCTURE
MORTARS
RADIOACTIVE WASTE STORAGE
SIMULATION
YOUNG MODULUS