期刊
MATERIALS AND STRUCTURES
卷 46, 期 3, 页码 375-381出版社
SPRINGER
DOI: 10.1617/s11527-012-9907-1
关键词
Geopolymer; Microwave; Radiation; Fly ash; Durability
资金
- Higher Education Research Promotion
- National Research University Project of Thailand
- Office of the Higher Education Commission, through the Advanced Functional Materials Cluster of Khon Kaen University
- Thailand Research Fund (TRF) [RTA5480004]
In this paper, 90-W microwave radiation for 5 min plus a shortened heat curing period was applied to cure the fresh geopolymer paste. Results showed that microwave radiation contributed to the dissolution of fly ash in the alkaline solution. Numerous gel formations were observed in microscopic scale. This resulted in a dense composite and strong bonding between the fly ash and the geopolymer matrix leading to high strength gain compared to those of the control pastes cured at 65 A degrees C for 24 h. In addition, resistances to the sulfuric acid and sulfate attacks of the microwave geopolymer were superior to that of the control as indicated by the relatively low strength loss. The microwave radiation also helped the geopolymer attaining thermal stability as the dense matrices were obtained.
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