Dry Mix Slag—High-Calcium Fly Ash Binder. Part Two: Durability  

作　　者：Alexey Brykov Mikhail Voronkov Alexey Brykov;Mikhail Voronkov(Department of Chemical Technology of High-Melting Non-Metallic and Silicate Materials, Saint Petersburg State Institute of Technology, St. Petersburg, Russia)

机构地区：[1]Department of Chemical Technology of High-Melting Non-Metallic and Silicate Materials, Saint Petersburg State Institute of Technology, St. Petersburg, Russia

出　　处：《Materials Sciences and Applications》2024年第3期37-51,共15页材料科学与应用期刊（英文）

摘　　要：This work investigates durability of cement-free mortars with a binder comprised of ground granulated blast furnace slag (GGBFS) activated by high-calcium fly ash (HCFA) and sodium carbonate (Na₂CO₃): the soundness, sulfate resistance, alkali-silica reactivity and efflorescence factors are considered. Results of tests show that such mortars are resistant to alkali-silica expansion. Mortars are also sulfate-resistant when the amount of HCFA in the complex binder is within a limit of 10 wt%. The fineness of fly ash determines its’ ability to activate GGBFS hydration, and influence soundness of the binder, early strength development, sulfate resistance and efflorescence behavior. The present article is a continuation of authors’ work, previously published in MSA, Vol. 14, 240-254.This work investigates durability of cement-free mortars with a binder comprised of ground granulated blast furnace slag (GGBFS) activated by high-calcium fly ash (HCFA) and sodium carbonate (Na₂CO₃): the soundness, sulfate resistance, alkali-silica reactivity and efflorescence factors are considered. Results of tests show that such mortars are resistant to alkali-silica expansion. Mortars are also sulfate-resistant when the amount of HCFA in the complex binder is within a limit of 10 wt%. The fineness of fly ash determines its’ ability to activate GGBFS hydration, and influence soundness of the binder, early strength development, sulfate resistance and efflorescence behavior. The present article is a continuation of authors’ work, previously published in MSA, Vol. 14, 240-254.

关 键 词：Ground Granulated Blast-Furnace Slag High-Calcium Fly-Ash Sodium Car-bonate Blast-Furnace Slag Binder DURABILITY ASR Sulfate Attack SOUNDNESS EFFLORESCENCE 

分 类 号：TF1[冶金工程—冶金物理化学]