Durability improvement of steel-making slag concrete

钢渣混凝土是由炼铁厂的副产品磨细的高炉矿渣和铁水预处理渣制成的。这种建筑材料在日本被称为环保材料。研究表明，钢渣混凝土的强度取决于钢渣混凝土拌和后的pH值。研究还表明，由于铁水预处理渣中氢氧化钙的浸出，钢渣混凝土长期具有较高的抗碳化和钢筋锈蚀能力。但是，钢渣混凝土的抗冻融性能较差。本文提出了提高混凝土抗冻融性能的方法。

Steel-making slag concrete is made of ground granulated blast furnace slag and hot metal pretreatment slag that are by-products at ironworks. This type of construction materials is called environmental conscious material in Japan. This study shows that the strength of steel-making slag concrete depends on pH of steel-making slag concrete after mixing. It also shows that the resistance to carbonation and steel rod corrosion of steel-making slag concrete is high for a long time due to calcium hydroxide leaching from hot metal pretreatment slag. However, resistance to freezing and thawing of steel-making slag concrete is quite low. In this paper, the method to enhance the resistance to freezing and thawing is shown.