Transfer properties in cement-based porous materials: Part 1 – Evolution of fluid transfers in crack healing

摘要

The aim of the study is to characterize the healing process of cracks in cementitious materials and tests have been developed for this purpose. The experimental program consists of creating a crack in a concrete or cement paste specimen and sealing the formed crack by percolation with a fluid containing carbonates. The paper first focuses on the description of the experimental device developed for percolation tests. The second part of the paper presents the results obtained and assesses the effects of the experimental parameters (crack width, hydraulic gradient and carbonate content of the percolating fluid) on the healing process. The different phenomena involved in the healing process are also highlighted with a view to its further modeling.