Influence of Curing Regimes on Engineering and Microstructural Properties of Geopolymer-Based Materials from Water Treatment Residue and Fly Ash
Geopolymerization is a new method for treating water treatment residue (WTR) from water purification plants to reduce the amount of stored land in urban areas. Polymeric bond formation depends on the curing conditions. In this study, the curing conditions suitable for subsequent treatme...
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| Autores principales: | , , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
Universitas Indonesia
2021
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/adc5a7a701784d6aa92b725c92d5c23f |
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| Sumario: | Geopolymerization is a new method for treating
water treatment residue (WTR) from water purification plants to reduce the
amount of stored land in urban areas. Polymeric bond formation depends on the
curing conditions. In this study, the curing conditions suitable for subsequent
treatment to save energy consumption and production costs in the future
application were investigated. The WTR had a high aluminosilicate
content with low alkaline activity, so fly ash (FA) was added to
FA and WTR mixtures in the ratio of 40 and
60 weight percent (% in wt.), respectively. The moisture
content of the mixtures ranged in 12–15%, suitable for semi-dry pressing to
form pellets. After this formation, the geopolymer samples were cured under
different conditions (room temperature, microwave oven, in
dryer at 110°C, and in autoclave with hydrothermal condition).
The experimental results showed that the hydrothermal samples had better
properties, such as pH<9, high stability of mechanical strength over 3.5
MPa, and soft coefficient over 0.75. The microstructural properties were
investigated using modern analytical tools, such as XRD, SEM, FTIR, and NMR, to
detect the chemical functional groups of the aluminosilicate networks in the
geopolymer matrix and the close relationship among the properties and its
microstructure. |
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