Role of microwave radiation in curing the fly ash geopolymer

被引：145

作者：

Chindaprasirt, Prinya ^{[1
]}

Rattanasak, Ubolluk ^{[2
,3
]}

Taebuanhuad, Sompop ^{[2
,3
]}

机构：

[1] Khon Kaen Univ, Sustainable Infrastruct Res & Dev Ctr, Dept Civil Engn, Fac Engn, Khon Kaen 40002, Thailand

[2] Burapha Univ, Dept Chem, Chon Buri 20131, Thailand

[3] Burapha Univ, Fac Sci, Ctr Innovat Chem, Chon Buri 20131, Thailand

来源：

ADVANCED POWDER TECHNOLOGY | 2013年 / 24卷 / 03期

关键词：

Geopolymer; Microwave radiation; Microstructure; Compressive strength; HYDROTHERMAL TREATMENT; 2-STEP PROCESS; NA-A; COAL; ZEOLITE; CONCRETE; PHASE;

D O I：

10.1016/j.apt.2012.12.005

中图分类号：

TQ [化学工业];

学科分类号：

081705 [工业催化];

摘要：

Fly ash geopolymer requires rather long heat curing to obtain reasonable strength development at an early age. However, the long heat curing period limits the application of the fly ash geopolymer. High strength development and a reduction in heat curing duration have been considered for energy saving. Therefore, this research proposed a process using 90-W microwave radiation for 5 min followed by conventional heat curing for high-calcium fly ash geopolymer. Results showed that the compressive strengths of geopolymer with microwave radiation followed by conventional heat curing were comparable to those of the control cured at 65 degrees C for 24 h. Microwave radiation gave the enhanced densification. In addition, SEM images showed that the gels formed on the fly ash particles owing to the promoted dissolution of amorphous phases from fly ash. This method accelerated the geopolymerization and gave the high compressive strength comparable to the conventional curing. (C) 2012 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.

引用

页码：703 / 707

页数：5

共 19 条

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Environmental, physical and structural characterisation of geopolymer matrixes synthesised from coal (co-)combustion fly ashes [J].