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- 한양대학교 세라믹공정연구센터 Journal of Ceramic Processing Research Journal of Ceramic Processing Research 제21권
- 발행연도
- 2020.1
- 수록면
- 0 - 0 (0page)
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In this study, lightweight foamed geopolymers based on metakaolin were synthesized and characterized. By considering thecompressive strength, density, and crystal phase of the specimens according to the type and amount of forming agent, thepossibility of replacing Al powder, a foaming agent, with Si sludge in lightweight foamed geopolymers was analyzed. Thespecimens foamed with Al powder had lower density than those with Si sludge. However, the compressive strength of theformer was higher than that of the specimens foamed with Si sludge, owing to a more uniform pore distribution andmicrostructure. Through this study, lightweight foamed geopolymers having density of 0.36~1.05 g/cm3 and compressivestrength of 0.7~4.7 MPa can be prepared by controlling the process conditions such as the amount of Si sludge added, alkaliactivator concentration, L/S ratio, etc. The possibility of Si sludge replacing Al powder as a foaming agent thus has beendemonstrated. The lightweight foamed geopolymer fabricated in this study can be applied to various fields as it can meet therequired physical properties according to the application.
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