Tailored design of properties of Hongsa fly ash-based geopolymer paste via an adjustment of the alkali activator composition
| Autor: | Viengsai Phavongkham, Suthee Wattanasiriwech, Darunee Wattanasiriwech |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Materials science Process Chemistry and Technology 02 engineering and technology 021001 nanoscience & nanotechnology Alkali metal 01 natural sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Geopolymer Compressive strength Fly ash 0103 physical sciences Activator (phosphor) Materials Chemistry Ceramics and Composites Composition (visual arts) Composite material 0210 nano-technology |
| Zdroj: | Ceramics International. 47:13374-13380 |
| ISSN: | 0272-8842 |
| Popis: | The composition of the alkali activator was proven to significantly affect the properties of Hongsa fly ash-based geopolymer paste, which, in turn, was found to be beneficial to the product application design. In this research, the composition of the alkali activator was selected by adjusting Na2SiO3/NaOH ratio. The results showed that the compressive strength of the geopolymer paste increased when the ratio of Na2SiO3/NaOH increased and reached its maximum of 26.54 MPa at the ratio of 0.6 before being decreased with further increasing the ratio. The high-temperature resistance of the geopolymers prepared with two conditions, Na2SiO3-free (M − 00) and 0.6 Na2SiO3/NaOH ratios (M − 06), was assessed. The results showed that the geopolymer M − 06 started to deform and crack after heating at ≥ 600 °C while the geopolymer M − 00 did not show significant deterioration. The geopolymer M − 00 could retain its compressive strength much better than the geopolymer M − 06, making it suitable as a lightweight high temperature resistant-component in construction. The geopolymer M − 06 was marked to provide an excellent low-temperature compressive strength so it can be used as a geocement binding material. |
| Databáze: | OpenAIRE |
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