Étude de la durabilité des bétons drainants au gel/dégel
Investigation of freeze-thaw durability of pervious concrete
TAHIRI
Type de document
THESE
Langue
anglais
Auteur
TAHIRI
Résumé / Abstract
Pervious concrete, with a permeability ranging from 0.1 to 2 cm/s, is a material that quickly drains water from the surface to the soil through a connected network of intergranular pores. Intergranular connected poros-ity is achieved by using single-sized aggregates and limiting the use of fine aggregates. This material is a tool to mitigate the adverse effects of soil sealing, such as runoff and urban heat islands. Even if pervious concrete presents valuable advantages, it is subject to various durability challenges such as freeze-thaw and clogging. In fact, in cold regions, pervious con-crete structures are subjected to freeze-thaw cycles, which deteriorate the material, especially in saturated conditions and the presence of deicing salts. In this Ph.D., we aim to improve the freeze-thaw durability of pervious concrete and model its behavior in cold areas in saturated conditions and the presence of deicing salt. We attempt to accomplish this objective through an experimental campaign complemented with a modeling and numerical approach.
