In this study, industrial by-products such as desulfurization gypsum and C12A7-based slag was used for activating recycling water. Consequently, it was verified via test that workability and compressive strength were not affected on activated-sludge.

In this study, the recycling water that produced during remicon manufacturing was activated by desulfurization gypsum, and then mortar with activated-sludge was made. As a result, possibility of activated-sludge in remicon was verified via flow and compressive strength test.