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Fundamental study on suppressive effect of silicate-based surface penetrants for sulfuric acid degradation and suggestion for application to a service life extension of sewage facilities

Research Project

Project/Area Number 18K04313
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 22010:Civil engineering material, execution and construction management-related
Research InstitutionKanazawa Institute of Technology

Principal Investigator

OSHIMA Syunichi  金沢工業大学, バイオ・化学部, 教授 (30367453)

Co-Investigator(Kenkyū-buntansha) 山崎 誠志  静岡理工科大学, 理工学部, 教授 (40291760)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2018: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywordsけい酸塩系表面含浸材 / 硫酸劣化 / 透水抑制 / 硫酸塩劣化 / 改質効果 / 抑制効果
Outline of Final Research Achievements

In this study, a water permeability test, determination of neutralization depth by sulfuric acid and amount of sulfate ion penetration, and measurement of the Vickers hardness were performed using a mortar with impregnated silicate-based surface penetrants in order to evaluate the influence of the surface penetrants on sulfuric acid degradation. It was found the sufficiently modification effect on mortar could be obtained by using the silicate-based surface penetrants even after the after sulfuric acid degradation. By using the silicate-based surface penetrants, it was suggested that the neutralization depth by sulfuric acid and the amount of sulfate ion penetration on the mortar after sulfuric acid degradation were suppressed. It seems that porosity of surface layer is suppressed because the modification effect is sustained by remaining of insoluble salts at the surface layer.

Academic Significance and Societal Importance of the Research Achievements

硫酸劣化や硫酸塩劣化がけい酸塩系表面含浸材に及ぼす影響について、ほとんど議論されていないことに着目し、硫酸劣化後のモルタルにおける透水抑制効果や中性化抑制効果の評価に加えて、化学的な観点から、侵入した硫酸イオン量やその存在形態について検討し、硫酸劣化がけい酸塩系表面含浸材の塗布効果に及ぼす影響を定量的に評価したことは学術的かつ独創的である。本研究成果は、硫酸劣化を伴う環境下でのけい酸塩系表面含浸材の適用に関する情報を提供する点で社会的意義を有していると考える。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (2 results)

All 2020 2019

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (1 results)

  • [Journal Article] FUNDAMENTAL STUDY SULFURIC ACID DEGRADATION ON MORTAR IMPREGNATED WITH SILICATE-BASED SURFACE PENETRANTS2020

    • Author(s)
      大嶋俊一、大溝尚英、宮里心一、黒岩大地
    • Journal Title

      Cement Science and Concrete Technology

      Volume: 73 Issue: 1 Pages: 229-236

    • DOI

      10.14250/cement.73.229

    • NAID

      130007822477

    • ISSN
      0916-3182, 2187-3313
    • Year and Date
      2020-03-31
    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] けい酸塩系表面含浸材におけるけい酸ナトリウムのモル比とモルタルの改質効果に関する検討2019

    • Author(s)
      大嶋俊一、黒岩大地、西野英哉、宮里心一
    • Organizer
      コンクリート工学年次大会2019
    • Related Report
      2019 Research-status Report 2018 Research-status Report

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Published: 2018-04-23   Modified: 2022-01-27  

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