Plastic and nonmetallic article shaping or treating: processes – Outside of mold sintering or vitrifying of shaped inorganic... – Of clay containing material
Reexamination Certificate
2006-05-13
2009-10-06
Griffin, Steven P (Department: 1791)
Plastic and nonmetallic article shaping or treating: processes
Outside of mold sintering or vitrifying of shaped inorganic...
Of clay containing material
C264S638000, C264S639000, C264S679000
Reexamination Certificate
active
07597839
ABSTRACT:
This invention relates to a method for manufacturing an artificial ultra-lightweight aggregate having a specific gravity of 0.8-0.9 using raw sewage sludge. According to the invention, raw sewage sludge and water-free waste are mixed into a blend having a water content that allows the optimal extrusion, whereby excellent ultra-lightweight aggregate which has low water absorption rate and, low slump loss can be produced. In addition, the collective treatment of waste and the mass production of recycled products are possible without addition of a drying process for raw sewage sludge, and thus excellent ultra-lightweight aggregate can be supplied at low cost.
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Jeong Young-Ho
Kang Seung-Gu
Kim Jung-Hwan
Kim Yoo-Taek
Lee Ki-Gang
Griffin Steven P
Hultquist Steven J.
Intellectual Property / Technology Law
Kemmerle, III Russell J
Kyonggi University Industry & Academia Cooperation Foundati
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