Development of high durability cathodic protection method which can be in harmony with marine ecosystem

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K04553
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 22010:Civil engineering material, execution and construction management-related
• Research Institution: The University of Tokushima
• Principal Investigator: UEDA Takao 徳島大学, 大学院社会産業理工学研究部(理工学域), 教授 (20284309)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: コンクリート / アミノ酸 / 電気防食 / 陽極被覆材 / 防食効果

Outline of Final Research Achievements

A concrete mixed with arginine which is a kind of amino-acid has been developed as a eco-concrete which can be in harmony with marine environment. On the other hand, the RC structures applied cathodic protection as the countermeasure against chloride-induced steel corrosion are increasing although relatively early deterioration of covering material of anode with the electrochemical treatment.
This study investigates the durability of anode system and protection effect of cathodic protection employing anode covering mortar admixing high basicity arginine.
As a result, the anode-covering mortar containing arginine shows enough performance for the application to actual structures. Moreover, the addition of arginine tend to reduce the deterioration degree of anode-covering mortar subjected to the electrochemical treatment.

Free Research Field

コンクリート工学

Academic Significance and Societal Importance of the Research Achievements

本研究により，海洋環境の保全に配慮しつつ，高耐久性の電気防食工法を開発することができた。従来の電気防食工法は，陽極被覆材の劣化現象が大きな課題となっていたため，本研究により，耐久性の観点から信頼性の高い電気防食工法が提案できたことは，学術的に大きな意義がある。また，本工法により，海洋環境の回復・保全が期待されることから，環境への配慮が重視される現状において，社会的意義も大きいと言える。