Resistance to acid and sulfate solutions of microwave-assisted high calcium fly ash geopolymer

被引：143

作者：

Chindaprasirt, Prinya ^{[1
]}

Rattanasak, Ubolluk ^{[2
,3
]}

Taebuanhuad, Sompop ^{[2
,3
]}

机构：

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

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

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

来源：

MATERIALS AND STRUCTURES | 2013年 / 46卷 / 03期

关键词：

Geopolymer; Microwave; Radiation; Fly ash; Durability; CONCRETE; COAL;

D O I：

10.1617/s11527-012-9907-1

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

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.

引用

页码：375 / 381

页数：7

共 16 条

[1] Utilization of fly ash blends from pulverized coal and fluidized bed combustions in geopolymeric materials [J].