Performance of alkali-activated fly ash incorporated with GGBFS and micro-silica in the interfacial transition zone, microstructure, flowability, mechanical properties and drying shrinkage

This paper discusses alkali-activated material focusing on low calcium fly ash. The preliminary work investigated setting time and compressive strength of alkali-activated paste using two different of low calcium fly ash, one from the Power Plant in Japan, the other from a fertilizer plant in Indone...

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Main Authors: Tajunnisa, Yuyun, Sugimoto, Masaaki, Uchinuno, Takahiro, Sato, Takahiro, Toda, Yoshinori, Hamasaki, Arisa, Yoshinaga, Toru, Shida, Kenji, Shigeishi, Mitsuhiro
Format: Conference Proceeding
Language:English
Subjects:
Blast furnace slags
Calcium
Compression zone
Compressive strength
Drying
Electric power generation
Fly ash
Granulation
Mechanical properties
Microstructure
Mortars (material)
Shrinkage
Silica fume
Silicon dioxide
Time compression
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Summary:This paper discusses alkali-activated material focusing on low calcium fly ash. The preliminary work investigated setting time and compressive strength of alkali-activated paste using two different of low calcium fly ash, one from the Power Plant in Japan, the other from a fertilizer plant in Indonesia, respectively denoted JFA and IFA. The paste which was consolidated using ash required the final setting times: JFA-ash paste - 4.5 - 7 days; IFA-ash paste - 1.5 - 2 days. This subsequent investigation applied incorporation of ground granulated blast furnace slag (GGBFS) and micro-silica (M) as JFA-ash replacement in Alkali-activated Mortar (AAM) to enhance system performance. The work reveals effects of GGBFS and M incorporated to JFA-ash mixed alkaline solution on flowability, compression, flexural strength, drying shrinkage, microstructure and Interfacial Transition Zone (ITZ) performance.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.5003517