https://hal-cea.archives-ouvertes.fr/cea-03534471Poyet, StéphaneStéphanePoyetLECBA - Laboratoire d'Etude du Comportement des Bétons et des Argiles - SECR - Service d'Etudes du Comportement des Radionucléides - DPC - Département de Physico-Chimie - CEA-DES (ex-DEN) - CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) - CEA - Commissariat à l'énergie atomique et aux énergies alternatives - Université Paris-SaclayWater transport properties of virtual fractal porous media: implications for the unsaturated transport properties of cement-based materialsHAL CCSD2021[CHIM.MATE] Chemical Sciences/Material chemistry[SPI.GCIV] Engineering Sciences [physics]/Civil Engineering[SPI.GCIV.CD] Engineering Sciences [physics]/Civil Engineering/Construction durableCEA, Contributeur MAP2022-01-19 14:30:052022-01-21 04:05:372022-01-19 14:30:05enJournal articles10.1016/j.cemconres.2021.1066131Cement-based materials are more and more recognized as fractal materials. From a practical point of view, fractality means that the pore size distribution can be described using fractal scaling law (i.e. power functions). Here, the simplest scaling law making use of a single fractal dimension was used to generate simple and virtual fractal porous media (based on bundles of parallel cylindrical pores). The capillary curve and permeability (relative and intrinsic) of the virtual porous media were then estimated through theoretical and numerical approaches.The results show that: (1) although bereft of any physical basis, van Genuchten equation bears some fractal information; (2) although highly flexible, van Genuchten equation fails to perfectly fit the capillary curves and can thus generate error in inverse analysis (for intrinsic permeability evaluation) and (3) there seems to be a relation between the intrinsic permeability and van Genuchten pressure parameter.