Durability of Seawater Mixed Concrete with Different Replacement Ratio of BFS （Blast Furnace Slag） and FA （Fly Ash）

作     者：Nobuaki Otsuki Aung Kyaw Min Tomohiro Nagata Cheng Yi 

作者机构：Department of International Development Engineering Tokyo Institute of Technology Tokyo 152-8552 Japan Civil Engineering Unit Chiyoda Corporation Yokohama 230-0077 Japan 

出 版 物：《Journal of Civil Engineering and Architecture》 (土木工程与建筑（英文版）)

年 卷 期：2016年第10卷第5期

页      面：568-580页

学科分类：1007[医学-药学(可授医学、理学学位)] 08[工学] 081304[工学-建筑技术科学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0813[工学-建筑学] 10[医学] 

主　　题：Seawater chloride attack corrosion durability of concrete blast furnace slag fly ash. 

摘      要：Using seawater in concrete can be considered as one of the sustainable approaches in construction industry not only to save the freshwater resource but also to promote the use of abandoned seawater resource, especially in the construction at the uninhabited area close to the sea where the procurement of fresh water is difficult. In this study, durability against chloride attack of seawater mixed concrete with different replacement ratio of BFS （blast furnace slag） and FA （fly ash） is discussed and the life time until the occurrence of corrosion crack is evaluated. The results show that： （1） Chloride penetration rate of seawater mixed specimens with BFS and FA is lower than that of freshwater mixed OPC （ordinary Portland cement） specimens; （2） Oxygen permeability of seawater mixed specimens with BFS and FA is almost the same or lower than that of freshwater mixed OPC specimens; （3） Total life time （corrosion incubation period and propagation period） of seawater mixed specimens with BFS and FA is almost the same or only slightly shorter than that of freshwater mixed OPC specimens. From the results, it was confirmed that the usage of seawater in concrete mixing is feasible in concrete with the appropriate BFS and FA replacement ratio.