EVALUATION OF WATER IN HARDENED CEMENT-BASED MATERIALS USING BROADBAND DIELECTRIC MEASUREMENTS

Abstract

The cement-based materials have various void spaces, and water stays inside these spaces. If the structure of void spaces changes as curing progresses, the state of water inside void spaces also changes. Therefore, the state of water will be able to be treated as an index of curing progress. In this work, the dielectric relaxation processes reflecting motion of water molecules in the cement-based materials were observed using broadband dielectric measurements to clarify the state of water. The relationships between the characteristics of the relaxation processes observed and curing progress were examined.