A NOVEL METHOD TO REUSE PAPER SLUDGE AND COGENERATION ASHES FROM PAPER-MILL

The purpose of this study is to develop a technology for reusing the p aper sludge and co-generation ashes generated by the paper industry. T he study will include the following: (1) employing granulation technol ogy to produce a light-weight aggregate with a specific gravity less t han 1.0 from paper wastes sludge, and a light-weight aggregate with a specific gravity less than 1.5 from co-generation ashes; (2) employing compounding technology to mix co-generation ashes with ceramic materi als, and then to make it into constructional bricks through forming an d sintering processes. The physical property tests have proved that th e granulated light-weight aggregates having potential to replace the n atural aggregate to make light-weight concrete. The constructional bri cks made from co-generation ashes and other raw materials have a water absorption rate lower than 15%, and compressive strength greater than 150 kgf/cm(2), can conform to CNS specifications. (C) 1998 Elsevier S cience B.V.