A reappraisal of the ink-bottle effect and pore structure of cementitious materials using intrusion-extrusion cyclic mercury porosimetry

Reliable characterization of the pore structure is essentially important for transport-related durability studies cementitious materials. Mercury intrusion porosimetry has been commonly used measurement while ink-bottle effect significantly affects trustworthiness size features Pressurization-depressurization cycling mercury (PDC-MIP) an alternative approach previously reported with purpose to provide better estimates results. It found however that PDC-MIP greatly overestimates volume owing incomplete extrusion in throat pores after pressurization-depressurization cycle. Intrusion-extrusion cyclic (IEC-MIP), as a further improvement, then described, which can reliably capture and obtain clear picture distribution The cement pastes observed being size-dependent role critical emphasized. Water-cement ratio primarily changes effective porosity plays minor porosity. addition reactive blends substantially enhances during penetration into small pores. IEC-MIP tests, together unique data analysis, enable more truthful distribution.