MINERAL BLOCKS FOR SIDEWALK AND ROADWAY AND MANUFACTURING METHOD THEREOF

摘要

PURPOSE: Provided is a manufacturing method of mineral blocks for sidewalk and roadway which has improved strength, durability and various colors compared with conventional cement blocks by using sewage sludge material and additives such as kaolin, clay and mineral binder. CONSTITUTION: The method comprises the steps of: drying sewage sludge(water content: 70-85%) in air; burning organics at 300-600deg.C; mixing 65-75wt.% of sewage sludge, 20-25wt.% of clay and 5-10wt.% of mineral binder(bentonite) for 20-30mins; adding an effective amount of water; pressing and hot-blast drying; sintering at 1000-1400deg.C for 8hrs.