CONCRETE CRACK RECOVERY PERFORMANCE TEST METHOD

摘要

The present invention provides a concrete crack recovery performance test method, comprising the steps of: applying a cylinder-shaped concrete test piece by using epoxy as a whole; dividing the applied concrete test piece into two halves; disposing the bisected concrete test piece between an aqueous 5%-NaCl solution and an aqueous 0.3 N-NaOH solution; measuring chlorine ions passing through the bisected concrete test piece by applying DC voltage of 40 V to 80 V to the aqueous 5%-NaCl solution and the aqueous 0.3 N-NaOH solution for 4 to 8 hours; providing non-hydrated C_2S or non-hydrated C_3S and moisture to the cracked surface of the bisected concrete test piece so as to heal cracks; disposing the crack-healed concrete test piece between an aqueous 5%-NaCl solution and an aqueous 0.3 N-NaOH solution; and measuring chlorine ions passing through the crack-healed concrete test piece by applying DC voltage of 40 V to 80 V to the aqueous 5%-NaCl solution and the aqueous 0.3 N-NaOH solution for 4 to 8 hours.;COPYRIGHT KIPO 2018