Details

Autor(en) / Beteiligte

• Derluyn, Hannelore
• Moonen, Peter
• Carmeliet, Jan

Titel

Deformation and damage due to drying-induced salt crystallization in porous limestone

Ist Teil von

• Journal of the mechanics and physics of solids, 2014-02, Vol.63 (1), p.242-255

Ort / Verlag

Elsevier Ltd

Erscheinungsjahr

2014

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• This paper presents a computational model coupling heat, water and salt ion transport, salt crystallization, deformation and damage in porous materials. We focus on crystallization-induced damage. The theory of poromechanics is employed to relate stress, induced by crystallization processes or hygro-thermal origin, to the material's mechanical response. A non-local formulation is developed to describe the crystallization kinetics. The model performance is illustrated by simulating the damage caused by sodium chloride crystallization in a porous limestone. The results are compared with experimental observations based on neutron and X-ray imaging. The simulation results suggest that the crystallization kinetics in porous materials have to be accurately understood in order to be able to control salt damage. The results show that the effective stress caused by salt crystallization depends not only on the crystallization pressure but also on the amount of salt crystals, which is determined by the spreading of crystals in the porous material and the crystallization kinetics. •Model for heat and mass transport, salt crystallization, deformation and damage.•Effective stress depends on crystallization pressure and precipitated crystal amount.•Simulation of damage due to drying-induced NaCl crystallization in limestone.•Simulations confirm the experimental assessment of damage.•Controlling the crystallization kinetics is the key to control crystallization damage.