2007 Volume 1 Pages 1-10
Steel-making slag concrete consisted of by-products from ironworks. Ground granulated blast furnace slag was used as a binder. Air cooled slag from the steel-making process was used as an aggregate. The steel-making slag concrete did not use any natural aggregate, fine or coarse. The strength of the steel-making slag concrete was 20 N/mm² to 50N/mm² at 28 days. It was as strong as that of normal cement concrete. Resistance to carbonation of the steel-making slag concrete and resistance to corrosion of a steel rod in the steel-making slag concrete were high for a long time due to calcium hydroxide leaching from the steel-making slag. However, resistance to freezing and thawing of the steel-making slag concrete was low. In this paper, the mechanism of low resistance to freezing and thawing is clarified.
