Glass-ceramic from sewage sludge ash
Glass-ceramic was produced by adding limestone to sewage sludge incinerated ash. Black glass was produced by melting a blended ash batch at 1450°C. For nucleation, this glass was reheated at 800°C for 1 h, and reheated at 1100°C for 2 h to form glass-ceramic. The main components of sewage sludge incinerated ash are SiO2 and Al2O3. Because small amounts of Fe2O3, sulfur and carbon are included, the addition of limestone alone can generate the crystal nucleant, FeS, to form anorthite (CaO·Al2O3·2SiO2) crystal. The glass-ceramic showed superior characteristics of high strength and acid resistance for use in construction materials.
Unable to display preview. Download preview PDF.
- 1.Tokyo Metropolitan Sewerage Bureau, “Annual Technical Report”.Google Scholar
- 2.Y. TANAKA and T. KATO, J. Ceram. Soc. Jpn 86 (1978) 559.Google Scholar
- 3.E. M. RABINOVICH, in “The Fifth Conference on Mineral Engineering”, Israel (1980) p. 108.Google Scholar
- 4.Idem, Adv. Ceram. 4 (Nucl. Cryst. Glasses) (1982) 334.Google Scholar
- 7.N. M. PAVLUSHKIN, “Osnovy Tekhnologii Sitallov (Introduction to Technology of Glass-Ceramics)” (Stroiizdat, Moscow, 1970).Google Scholar
- 8.H. HARPER and P. W. McMILLAN, Phys. Chem. Glasses 13 (1972) 97.Google Scholar
- 9.E. E. OSBORN and A. MUAN, “Phase Diagrams for Ceramists” (American Ceramic Society, 1964) p. 210.Google Scholar