Application of Antifreeze Polysaccharide for Improving the Freezing Resistance of Concrete

2018 Fiscal Year Final Research Report

• Project/Area Number: 16K14294
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Civil engineering materials/Construction/Construction management
• Research Institution: Kansai University
• Principal Investigator: TSURUTA HIROAKI 関西大学, 環境都市工学部, 教授 (90253484)
• Research Collaborator: KAWAHARA hidehisa
• Project Period (FY): 2016-04-01 – 2019-03-31
• Keywords: 凍害 / コンクリート / 不凍多糖 / 凍結融解 / スケーリング / 凍結防止剤

Outline of Final Research Achievements

In this study, the research goal is clarifying the validity of mixing or coating for the improvement of freezing resistance in concrete and the validity of the application to anti-freezing agent by using Antifreeze Polysaccharide which is natural material.
In mixing of Antifreeze Polysaccharide, it was found that there were peak in the effective concentration of Antifreeze Polysaccharide and the surfactant effect in Antifreeze Polysaccharide, and much air was entrained in concrete by applying high concentration of Antifreeze Polysaccharide. In coating of Antifreeze Polysaccharide, it was found that there were effective concentration of Antifreeze Polysaccharide and possibility of the outflow of Antifreeze Polysaccharide. The advantage that conventional anti-freezing agent was exceeded couldn't be confirmed by single using Antifreeze Polysaccharide in application to anti-freezing agent.

Free Research Field

建設材料学、コンクリート工学

Academic Significance and Societal Importance of the Research Achievements

コンクリート構造物の凍害被害に対して、本技術は水の凍結時の膨張圧を低減するという、凍害の根本原因を解消するものである。そのような有益な技術を確立するためのステップとしての知見が本研究の成果で得られたことは学術的意義が大きいと考えている。
この技術の実用化により、コンクリート構造物の凍害被害が減少し維持管理経費も削減でき、構造物の長寿命化や、管理者の財政負担及び技術者の業務負担の軽減が可能となり、数多くの構造物の安全や維持管理をより効率的に行うことができ、社会的意義も大きいと考えられる。