METHOD FOR SOLIDIFICATION MOLDING OF ASH, SOLIDIFICATION MOLDING OF ASH AND ITS CRUSHED MATERIAL

• Main Authors: MIYAHARA KENICHI, MORITA NOBUHIKO
• Format: Patent
• Language: English
• Published: 12.09.2000
• Edition: 7
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; LIME, MAGNESIA; METALLURGY; REFRACTORIES; SLAG; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TREATMENT OF NATURAL STONE

PROBLEM TO BE SOLVED: To obtain a pavement material having sufficient strength by solidification molding a mixture obtained by adding cement and water to the ash subjected to a crushing treatment, thereby considerably increasing the compounding ratio of the ash. SOLUTION: A ball mill, tube mill, etc., are used for the pulverization treatment of the ash (e.g.: sludge incineration ash). More preferably, the dry density of the ash after the crushing is made larger by >=0.2 g/cm3 than the dry density of the ash prior to the crushing and to >=0.7 g/cm3. Portland cement, etc., are used as the cement. Molding is so executed that a moisture content ratio attains 5 to 40% when press molding, vacuum press molding or vibration molding is carried out and that the moisture content ratio attains 10 to 80% when extrusion molding or vacuum molding is executed. When the ash contains dioxins, etc., a dioxin decomposing agent is added to the ash. The bending strength of the solidification molding is preferably >=50 kgf/cm2 and the compressive strength >=330 kg/cm2.