Sealing of near-surface voids on cement concretes by combined application of metal-ethylenediaminetetraacetic acid complex solutions and high-heat treatment via hydrogen/oxygen coupled flame

Near-surface voids on a cement concrete sample were successfully sealed by applying a metal-ethylenediaminetetraacetic (EDTA) acid complex solution, followed by treatment with high-heat hydrogen/oxygen (H2-O2) coupled flame. The calcium aluminates used for sealing were fabricated on cement substrates using calcium-aluminate (Ca,Al)-EDTA solutions prepared at various elemental ratios. The sealing effects were investigated through crystal & pore...