Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Compressive strength, resistance to chloride-ion penetration and freezing/thawing of slag-replaced concrete and cementless slag concrete containing desulfurization slag activator
Highlights Desulfurization slag affects the strength development of slag-replaced concrete and cementless slag concrete. For cementless slag concrete, ettringite is observed at the long-term age. Cementless slag concrete shows the greatest resistance to chloride-ion penetration. Rapid freezing failure occurs for cementless slag concrete.
Abstract In this research, desulfurization slag (DS), a byproduct generated during steel production, was used as an activator for ground granulated blast-furnace slag (GGBS), and the compressive strength, resistance to chloride-ion penetration and freezing/thawing of slag-replaced concrete and cementless slag concrete containing DS activator was evaluated. The experimental results indicated that DS affects the strength development of slag-replaced concrete and cementless slag concrete when used as an activator. Moreover, a constant increase in the compressive strength was observed during the long-term aging of cementless slag concrete with a DS and anhydrous gypsum mixture. However, the transformation of ettringite to monosulfate was not effective; a large quantity of ettringite was observed at a long-term age of 910days in the cementless slag concrete. In addition, a high resistance to chloride-ion penetration was obtained for high-volume slag concrete. The resistance to chloride-ion penetration was greater in cementless slag concrete. On the other hand, cementless slag concrete, which had a high volume of capillary pores, had the lowest resistance to freezing/thawing.
Compressive strength, resistance to chloride-ion penetration and freezing/thawing of slag-replaced concrete and cementless slag concrete containing desulfurization slag activator
Highlights Desulfurization slag affects the strength development of slag-replaced concrete and cementless slag concrete. For cementless slag concrete, ettringite is observed at the long-term age. Cementless slag concrete shows the greatest resistance to chloride-ion penetration. Rapid freezing failure occurs for cementless slag concrete.
Abstract In this research, desulfurization slag (DS), a byproduct generated during steel production, was used as an activator for ground granulated blast-furnace slag (GGBS), and the compressive strength, resistance to chloride-ion penetration and freezing/thawing of slag-replaced concrete and cementless slag concrete containing DS activator was evaluated. The experimental results indicated that DS affects the strength development of slag-replaced concrete and cementless slag concrete when used as an activator. Moreover, a constant increase in the compressive strength was observed during the long-term aging of cementless slag concrete with a DS and anhydrous gypsum mixture. However, the transformation of ettringite to monosulfate was not effective; a large quantity of ettringite was observed at a long-term age of 910days in the cementless slag concrete. In addition, a high resistance to chloride-ion penetration was obtained for high-volume slag concrete. The resistance to chloride-ion penetration was greater in cementless slag concrete. On the other hand, cementless slag concrete, which had a high volume of capillary pores, had the lowest resistance to freezing/thawing.
Compressive strength, resistance to chloride-ion penetration and freezing/thawing of slag-replaced concrete and cementless slag concrete containing desulfurization slag activator
Lee, Bokyeong (Autor:in) / Kim, Gyuyong (Autor:in) / Nam, Jeongsoo (Autor:in) / Cho, Bongsuk (Autor:in) / Hama, Yukio (Autor:in) / Kim, Raehwan (Autor:in)
Construction and Building Materials ; 128 ; 341-348
13.10.2016
8 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
AG , anhydrous gypsum , DS , desulfurization slag , GGBS , ground granulated blast-furnace slag , MIP , mercury intrusion porosimetry , SEM , scanning electron microscopy , Desulfurization slag , Slag-replaced concrete , Cementless slag concrete , Compressive strength , Chloride-ion penetration , Freezing/thawing
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