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Prediction of movement, reaction and accumulation of multi-component medium in porous building material

Research Project

Project/Area Number 13305039
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Architectural environment/equipment
Research InstitutionKyoto University

Principal Investigator

HOKOI Shuichi  Kyoto Univ., Graduate School of Eng., Professor, 工学研究科, 教授 (80111938)

Co-Investigator(Kenkyū-buntansha) NAGAI Hisaya  Mie Univ., Faculty of Eng., Associate Professor, 工学部, 助教授 (40283402)
TAKADA Satoru  Kyoto Univ., Graduate School of Eng., Research Associate, 工学研究科, 助手 (20301244)
HARADA Kazunori  Kyoto Univ., Graduate School of Eng., Associate Professor, 工学研究科, 助教授 (90198911)
Project Period (FY) 2001 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥32,760,000 (Direct Cost: ¥25,200,000、Indirect Cost: ¥7,560,000)
Fiscal Year 2002: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2001: ¥27,560,000 (Direct Cost: ¥21,200,000、Indirect Cost: ¥6,360,000)
Keywordsporous material / concrete / neutralization / moisture diffusivity / multi-component / gamma-ray measuring apparatus / equilibrium relationship / 建築多孔質材料 / 長寿命化 / 拡散 / 多成分・多相媒質 / 化学反応 / 酸性雨 / γ線装置
Research Abstract

Regarding global environmental, energy and resource problems, longer life and durability of building materials and elements are strongly required in the field of architecture. Since most of the building materials are porous, the prediction and evaluation of movement and accumulation of the moisture and other diffusing substances in porous materials with a suitable precision are very important for an improvement of their durability. The objectives of this research are, to clarify how multi-component, multi-phase media exist, transfer and react in a porous building material, to propose a simplified model, and to develop measuring apparatuses of diffusivity and potential relationships.
Experiments on infiltration of acid rain (solution) and diffusion of CO2 gas into concrete sample were carried out in order to investigate the position and degree of neutralization. Based on the results, difference in neutralization rates between gas diffusion and liquid infiltration was clarified. It was al … More so shown that water permeability is significantly different depending on the vertical positions of the test sample.
From a viewpoint that the moisture and mass transfer through cracks have a significant influence on neutralization, and it is also affected by the external climates, the influence that the cracks have on the results was examined analytically.
A gamma-ray apparatus for man-distractive moisture content measurement was designed and produced. Based on the measured results, several issues related to measurement practice were examined and measurement errors were clarified. A new theoretical approach was proposed which describes the diffusion process of multi-components in a porous material with chemical reactions. Furthermore, a simplified -method for estimating equilibrium relationships of multi-component media was proposed and its validity was examined. In particular, porous structure of and moisture transfer process in a very thin material such as clothing was studied, and an influence that the change in potential relationships caused by salt solution has on the evaporation process. Less

Report

(3 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • Research Products

    (13 results)

All Other

All Publications (13 results)

  • [Publications] M.Matsumoto, S.Hokoi, M.Hatano: "Model for simulation of freezing and thawing processes in building materials"Building and Environment. Vol.36, No.6. 733-742 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 畑野雅範, 鉾井修一, 松本衛: "ALC壁体における凍結・融解過程に関する研究"日本建築学会計画系論文報告集. 第545号. 23-28 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 高田暁, 鉾井修一, 川上直紀, 工藤正則: "着衣における熱・水分の移動と蓄積を考慮した人体の非定常温熱生理応答-被験者実験とTwo-node modelを用いた解析-"日本建築学会計画系論文報告集. 第549号. 23-30 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 鉾井修一, 高田暁, 小森敏史: "寝具における熱水分移動とその人体温熱生理応答への影響"睡眠と環境. 第6巻、第1号. 71-77 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 高田暁, 鉾井修一: "被験者実験による発汗調節モデルの検討"睡眠と環境. 第6巻、第1号. 62-70 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] M. Matsumoto, S. Hokoi and M. Hatano: "Model for simulation of freezing and thawing processes in building materials"Building and Environment. Vol.36, No.6. 733-742 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] M. Masanori, S. Hokoi and M. Matsumoto: "Freezing-thawing process in ALC wall"Transactions of AIJ. No.545. 23-28 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] S. Takada, S. hokoi, N, Kawakami and M. Kudo: "Non-steady thermo-physiological responses considering heat and moisture transfer and accumulation in clothing subject experiment and an analysis using two-node model"Transactions of AIJ. No.549. 23-30 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] S. Hokoi, S. Takada and T. Komori: "Heat and moisture transfer in bedding and its influence on physiological responses"Sleeping and the Environment. Vol.6, No.1. 71-77 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] S. Takada and S. Hokoi: "Examination of sweating regulation model by subject experiment"Sleeping and the Environment. Vol.6, No.1. 62-70 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 中村慎, 山岡正洋, 樋口祥明, 鉾井修一: "モデルビルにおける省エネルギー効果と経済性 敷地内帯水層蓄熱システムに関する研究(その2)"日本建築学会計画系論文集. 554号. 41-46 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 中村慎, 清水孝昭, 樋口祥明, 鉾井修一: "都市部における帯水層蓄熱計画時の調査法に関する研究 その2)"日本建築学会計画系論文集. 560号. 23-30 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 細野雅範: "壁体における凍結・融解過程に関する研究"日本建築学会計画系論文集. 545号. 23-28 (2001)

    • Related Report
      2001 Annual Research Report

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Published: 2001-04-01   Modified: 2016-04-21  

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