The effect of a Pfa with a high total alkali content on pore solution composition and alkali silica reaction

1986 ◽  
Vol 38 (134) ◽  
pp. 30-35 ◽  
Author(s):  
P J Nixon ◽  
C L Page ◽  
R Bollinghaus ◽  
I Canham
Keyword(s):  
Pore Solution ◽  
Alkali Silica Reaction ◽  
Alkali Content ◽  
Solution Composition ◽  
Total Alkali

Discussion: The effect of a Pfa with a high total alkali content on pore solution composition and alkali silica reaction

1987 ◽  
Vol 39 (138) ◽  
pp. 51-54 ◽  
Author(s):  
P. J. Nixon ◽  
C. L. Page ◽  
R. Bollinghaus ◽  
I. Canham ◽  
D. W. Hobbs ◽  
...  
Keyword(s):  
Pore Solution ◽  
Alkali Silica Reaction ◽  
Alkali Content ◽  
Solution Composition ◽  
Total Alkali

scholarly journals Alkali-Silica Reaction Resistance and Pore Solution Composition of Low-Calcium Fly Ash-Based Geopolymer Concrete

2020 ◽  
Vol 5 (11) ◽  
pp. 96
Author(s):  
Jiawei Lei ◽  
Jiajun Fu ◽  
En-Hua Yang
Keyword(s):  
Fly Ash ◽  
Pore Solution ◽  
Systematic Investigation ◽  
Alkali Silica Reaction ◽  
Geopolymer Concrete ◽  
Portland Cement Concrete ◽  
Solution Composition ◽  
Low Calcium ◽  
Underlying Mechanisms ◽  
One Year

Low-calcium fly ash-based geopolymer concrete is generally reported to be less vulnerable to alkali-silica reaction (ASR) than conventional ordinary Portland cement concrete. However, the lack of understanding of pore solution composition of the low-calcium fly ash-based geopolymer limits the investigation of the underlying mechanisms for the low ASR-induced expansion in the geopolymer concrete. This study presents a systematic investigation of the pore solution composition of a low-calcium fly ash-based geopolymer over a period of one year. The results show that the pore solution of the fly ash geopolymer is mainly composed of alkali ions, silicates, and aluminosilicates species. The lower expansion of the geopolymer concrete in the current study is most probably due to the insufficient alkalinity in the geopolymer pore solution as the hydroxide ions are largely consumed for the fly ash dissolution.

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