A Proposal of Durability Evaluation Method for Chemical Degradation of Concrete Using Volcanic Sediment

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K14807
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 22010:Civil engineering material, execution and construction management-related
• Research Institution: Kyushu University
• Principal Investigator: Fukunga Takayuki 九州大学, 工学研究院, 助教 (20869408)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: シラス / 火砕流堆積物 / 温泉暴露 / ポゾラン反応

Outline of Final Research Achievements

This study was conducted to confirm the effect of concrete mixed with Shirasu on the acid resistance of a hot spring environment.
The effect of mixing Shirasu with concrete in the initial stage of immersion could not be confirmed well, but the effect was demonstrated as the immersion period became longer. Within the scope of this study, it was confirmed that the durability to acidic environments is improved. It was also clear that it is difficult to confirm the effect of Shirasu admixture in the current immersion test, and that other conditions or other experimental methods would be desirable to evaluate the effect.

Free Research Field

建設材料学

Academic Significance and Societal Importance of the Research Achievements

南九州に滞積するシラスは様々な種類が存在する。これらのシラスを有効に確認するには、シラスとセメントの反応性を明らかにし、活用方法を提案することが需要である。
本研究の成果は、温泉地域においてシラスを建設材料へ活用するための混和量などを明らかにしたことによって、シラスの活用方法を見出した点にあり、地域資源の新たな活用方法に組み込まれることが期待される。