The effect of enhancement of ceramics by incorporation of industrial laundry water cleaning sludge

Reference	Presenter	Authors (Institution)	Abstract
13-061	Priscila Brentan Praxedes	Praxedes, P.B.(Pontifícia Universidade Católica do Paraná);	This paper reports on the development of a new composite which uses industrial waste of water resources management - laundry water cleaning sludge (LS) - mixed with kaolin clay for the manufacture of ceramics. The compositions of these materials were fired at temperatures of 1,100 - 1,150 - 1,200 - 1,250 and 1,300°C. The raw materials and ceramics were characterized and analyzed by XRD, XRF, SEM, EDS, three-point bending flexural tests, water absorption and linear expansion. The flexural resistance strength of the compositions ranges from 2.80 to 12.52 MPa, linear shrinkage values vary from 4.52 to 14.06%, and water absorption values vary from 13.03 to 20.33% and density – from 1.65 to 1.83 g/cm3. Baking at temperatures of 1,150°C and 1,300°C with a partial melting of components destroys the crystalline structures of Kaolin, Gibbsite, Dickite, Dolomite, Almandine, Graphite, Rossite and Celsian in the chemical environment of the mixture of components, and leads to the synthesis of amorphous glassy substances and of some crystalline structures. The most important aspect of this research is the use of industrial wastes as water resources management as raw materials for the consequent reduction in the extraction of natural resources for the production of conventional and refractory ceramic materials, thus reducing the environmental burden caused by the indiscriminate disposal of these wastes.
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