2009 Fiscal Year Final Research Report

Durability improvement of steel-making slag concrete

Research Project

Project/Area Number	19560461
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Single-year Grants
Section	一般
Research Field	Civil engineering materials/Construction/Construction management
Research Institution	Okayama University
Principal Investigator	AYANO Toshiki Okayama University, 大学院・環境学研究科, 教授 (10212581)
Project Period (FY)	2007 – 2009
Keywords	鉄鋼スラグ水和固化体 / 凍結融解抵抗性 / 乾燥収縮ひずみ / 水酸化カルシウム / ポゾラン / 全水量
Research Abstract	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.

(3 results)