Red clay application in the utilization of paper production sludge and scrap glass to fabricate ceramic materials

摘要

The article describes the compositions with red clay, as principal component, for utilization of paper production sludge and scrap glass to fabricate red ceramics at sintering temperatures of 700 degrees, 800 degrees, 850 degrees, 900 degrees, 1000 degrees, 1050 degrees and 1100 degrees C. The raw and final materials were analyzed by XRF, XRD, SEM, EDS and LAMMA methods. The flexural strength tests of obtained ceramics reached till 11.7 MPa, water absorption till 12.6%, bulk densities varied from 1.79 to 1.86 g/cm(3), and shrinkage till 1.4%. These properties can be attributed to the sintering at 700 degrees and 1100 degrees C of ceramics with glassy structures and small inclusions of new crystalline minerals, such as mullite, albite, orthoclase and nepheline. (C) 2015 Elsevier B.V. All rights reserved.