Compressive strength, resistance to chloride-ion penetration and freezing/thawing of slag-replaced concrete and cementless slag concrete containing desulfurization slag activator

作者：Lee Bokyeong; Kim Gyuyong^*; Nam Jeongsoo; Cho Bongsuk; Hama Yukio; Kim Raehwan

来源：Construction and Building Materials, 2016, 128: 341-348.

DOI：10.1016/j.conbuildmat.2016.10.075

• Desulfurization slag
• Slag-replaced concrete
• Cementless slag concrete
• Compressive strength
• Chloride-ion penetration
• Freezing/thawing

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 910 days 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.

• 出版日期2016-12-15