Effects of Fly Ash and Ground Granulated Blast-Furnaces Slag on Properties of High-Strength Concrete

Abstract:

Effects of fly ash and ground granulated blast-furnace slag (GGBFS) on workability, strength, volume stability and durability of HSC are investigated. Results show that fly ash and GGBFS can improve the workability, increase the later strength of high strength concrete (HSC) remarkably, and reduce the brittleness. In addition, the ameliorative effect of GGBFS on HSC brittleness is more remarkable. With the increase of fly ash and GGBFS, the early elastic modulus of HSC reduces. The elastic modulus is similar to the controlled sample when the load is applied after 60d curing. The fly ash and GGBFS can improve HSC’s resistance to chloride ion penetration significantly. However, the effects of fly ash and GGBFS on freezing-hawing resistance of HSC are not obvious. Besides, the fly ash will reduce freezing-hawing resistance of HSC only when the content of mineral powder is up to 36%.

• Periodical: Key Engineering Materials (Volumes 405-406)
• Pages: 219-225
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.405-406.219
• Online since: January 2009
• Authors: Ji Liang Wang, Kai Min Niu, Zhi Feng Yang, Ming Kai Zhou, Li Qun Sun, Guo Ju Ke
• Keywords: Brittleness, Durability, Fly Ash (FA), Ground Granulated Blast Furnace Slag (GGBFS), HSC

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