Multibody approach for reactive transport modeling in discontinuous-heterogeneous porous media

Abstract

HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

Effects of the microstructural uncertainties on the poroelastic and the diffusive properties of mortar

“…To study the chemo-mechanics behavior of concrete, a multi-scale microporomechanics model was proposed in (Socié 2019;Socié et al 2019;Socié et al 2021). The model allows to estimate the diffusive and poroelastic properties of mortar and to highlight the effect of the microstructural characteristic.…”

“…and 𝐻 csh = 𝑔 csh (3/2𝑘 csh + 4/3𝑔 csh )/(𝑘 csh + 2𝑔 csh ) where the subscripts łcshž and łcpž denote C-S-H and cement paste respectively. We assume that the solid, called here łmain precipitated solid 𝜑 ms ž, see Equation (1), inducing the macroscopic swelling precipitates in the capillarity porosity and ITZ porosity (Socié et al 2021;Socié 2019). Accordingly, we do not consider the C-S-H poroelastic properties.…”

“…The hydration model differs from the one used by Bary and Béjaoui (2006); Tognevi (2012), which is the model of Tennis and Jennings (2000), because it is applied for a mature concrete and a totally hydrated reaction is assumed. The cement paste microstructure is estimated by a thermodynamical chemical model developed in (Socié et al 2021). This methodology is mainly used and validated in reactive transport (De Windt and Devillers 2010;Planel 2002;Seigneur et al 2020).…”

“…The hydration model of Socié (2019) is considered to estimate the uncertainties propagation reported in (Stutzman et al 2014). The comparison of different hydration models achieved in (Göbel et al 2017;Honorio et al 2020a;Venkovic et al 2013) with (Planel 2002): The thermodynamic chemical solver (Socié et al 2021) gives the concentration of each main phase of the cement phases and the molar fractions are simply deduced by multiplying the concentration by the molar volume. A Monte-Carlo scheme is carried out on the results of Stutzman et al (2014), see Table A.1, using a log-normal distribution for each phase.…”

“…The works previously mentioned are dedicated to the uncertainties of the analytical homogenization model applied to the estimation of the poroelastic or conductivity properties. The model developed in this study allows to estimate the poroelastic and diffusive properties of mortar used to simulate the chemo-poromechanical behavior of concrete submitted to chemical attacks (Socié et al 2019;Socié et al 2021). The work mainly focuses on two aspects: the effect of the ITZ material properties and volume fraction, and the effect of the uncertainties relative to the clinker composition.…”