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The effects of calcium formate on the early hydration of alkali silicate activated slag
https://orcid.org/http://orcid.org/0000-0002-2464-9651
Alkali silicate activated slag (AAS) most commonly develops high strength, but is usually accompanied by fast setting. In this study, slag was activated by a potassium silicate solution possessing different moduli (Ms = 0.7 and 1). The workability of the alkali activated slag mortar, at 4 and 20 min, was assessed by means of a mini-slump test. The sample with an Ms of 1 was not workable after 20 min. Calcium formate was subsequently added to extend the workable time of the mortar but this lowered its compressive strength. Ultrasonic measurements indicated a slower solid phase development in the AAS paste, in the presence of calcium formate, which was associated with a decreased amount of C–S–H gel in the hydrates.
The effects of calcium formate on the early hydration of alkali silicate activated slag
https://orcid.org/http://orcid.org/0000-0002-2464-9651
Alkali silicate activated slag (AAS) most commonly develops high strength, but is usually accompanied by fast setting. In this study, slag was activated by a potassium silicate solution possessing different moduli (Ms = 0.7 and 1). The workability of the alkali activated slag mortar, at 4 and 20 min, was assessed by means of a mini-slump test. The sample with an Ms of 1 was not workable after 20 min. Calcium formate was subsequently added to extend the workable time of the mortar but this lowered its compressive strength. Ultrasonic measurements indicated a slower solid phase development in the AAS paste, in the presence of calcium formate, which was associated with a decreased amount of C–S–H gel in the hydrates.
The effects of calcium formate on the early hydration of alkali silicate activated slag
https://orcid.org/http://orcid.org/0000-0002-2464-9651
Alkali silicate activated slag (AAS) most commonly develops high strength, but is usually accompanied by fast setting. In this study, slag was activated by a potassium silicate solution possessing different moduli (Ms = 0.7 and 1). The workability of the alkali activated slag mortar, at 4 and 20 min, was assessed by means of a mini-slump test. The sample with an Ms of 1 was not workable after 20 min. Calcium formate was subsequently added to extend the workable time of the mortar but this lowered its compressive strength. Ultrasonic measurements indicated a slower solid phase development in the AAS paste, in the presence of calcium formate, which was associated with a decreased amount of C–S–H gel in the hydrates.
The effects of calcium formate on the early hydration of alkali silicate activated slag
Mater Struct
Jin, Yu (author) / Stephan, Dietmar (author) / Lu, Zichen (author)
2019-03-21
Article (Journal)
Electronic Resource
English
The effects of calcium formate on the early hydration of alkali silicate activated slag
| Online Contents | 2019
The effects of calcium formate on the early hydration of alkali silicate activated slag
| Springer Verlag | 2019
Hydration Products of Alkali Activated Slag Cement
| Online Contents | 1995