Fundamental study on threshold pore diameter evaluation by nano particle permeation

Abstract

In this study, we investigated the validity of evaluating the maximum through pore (threshold pore) diameter from the maximum size of nanoparticles that can penetrate concrete. In the early stages of the experiments, the liquid that penetrated the specimens contained large particles that exceeded the threshold pore diameter; these particles were presumed to be hydrates that were floating in the water originally contained in the specimen. In contrast, the maximum particle size in the penetrated liquid after the initial water in the specimens was removed and nanoparticle dispersion liquid penetrated showed adequate agreement with the threshold pore diameter measured by a mercury intrusion test.