Comparative analysis of water condensate porosity using mercury intrusion porosimetry and nitrogen and water adsorption techniques in porous building stones

Condensate porosity in porous materials has a significant influence on comfort, energy consumption, and material’s strength durability. The variation of the moisture content material for given relative humidity describes storage capacity to be determined experimentally through water sorption isotherm. However, characterisation isotherm is very time-consuming, mostly high conditions, which may cause experimental errors reproducibility problems. This paper aims estimate condensate using mercury intrusion porosimetry nitrogen adsorption technique considering pores smaller than 0.1 μm wide range sedimentary rock types with different petrographic characteristics. Particularly characterisation, we interpolated pore volume BJH method applied desorption branch. In test, obtained maximum adsorbed at RH = 100%. ratio between total studied stones important varies from 2 38%. Nitrogen provides best estimation (R2 0.979) an effective porosity. correlation MIP moderate 0.892) presents wider dispersion all A mathematical expression that fits shape curvature was also analysed terms structure. These studies are scarce our results provide valuable information these widely used construction building material.