Conversion to glass-ceramics from glasses made by MSW incinerator fly ash for recycling
SCIE
SCOPUS
- Title
- Conversion to glass-ceramics from glasses made by MSW incinerator fly ash for recycling
- Authors
- Park, YJ; Heo, J
- Date Issued
- 2002-01
- Publisher
- ELSEVIER SCI LTD
- Abstract
- Glasses were made using fly ash from municipal solid waste (MSW) incinerators with the addition of SiO2. MgO and TiO2. The glasses were then converted to glass-ceramics for further recycling to construction materials. The optimum heat-treatment schedule for the ceramitization of glasses was 720 degreesC for 90 min for nucleation and 870 degreesC for 10 h for crystal growth. Diopside (CaMgSi2O6) was formed as a major crystalline phase. The glass-ceramics showed good mechanical properties with a hardness of 6.730 MPa, fracture toughness of 1.86 Mpa m(1/2) and bending strength of 127 MPa. Glasses and glass-ceramics with a composition of 20SiO(2)-5MgO-75fly ash-2TiO(2) (all given in wt.%) showed an excellent resistance against leaching of heavy metal ions in water. The amount of heavy metal ions leached after 18 h at 23 degreesC was well below regulation with Cd2+ <0.04 ppm. Cr3+ <0.004 ppm. Cu2+ <0.03 ppm and Pb2+ <0.15 ppm, respectively. (C) 2002 Elsevier Science Ltd and Techna S.r.l. All rights reserved.
- Keywords
- D. glasses; D. glass-ceramics; waste disposal; incineration; fly ash; vitrification; FRACTURE-TOUGHNESS; INDENTATION
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/18940
- DOI
- 10.1016/S0272-8842(02)00030-5
- ISSN
- 0272-8842
- Article Type
- Article
- Citation
- CERAMICS INTERNATIONAL, vol. 28, no. 6, page. 689 - 694, 2002-01
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