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Development of rough-surface-type retroreflective materials as countermeasures to urban heat islands

Research Project

Project/Area Number 16K06444
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Civil engineering materials/Construction/Construction management
Research InstitutionOsaka City University

Principal Investigator

Sakai Hideki  大阪市立大学, 大学院生活科学研究科, 准教授 (90277830)

Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2018: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Keywords再帰反射 / 環境材料 / ヒートアイランド / 都市環境 / 日射反射率 / 土木材料 / 環境調和型都市基盤整備・建築 / 人間生活環境
Outline of Final Research Achievements

Retroreflection is a unique optical property in which the incident light returns back in the direction of its source. Up to the present, two main optic structures have been used to achieve this property: ball lens optics constructed using glass beads, and corner cube optics constructed using prisms. In this study, we proposed another completely different retroreflective structure called the rough-surface-type. Its retroreflectivity is caused by a combination of surface roughness and its diffuse reflection. Therefore, it can withstand distortion and is suited for road surfaces.

Academic Significance and Societal Importance of the Research Achievements

近年,世界各地で夏季のヒートアイランド現象が顕在化しており,その対策が求められているが,本研究成果の導入による直接的効果として,夏季の日中晴天時の舗装路面の表面温度低下(現行の遮熱性舗装と同等以上),道路面からの照り返し日射量の低減(新規効果)が,さらに,間接的効果として,ヒートアイランド現象の緩和(日中の最高気温の抑制,熱帯夜日数の減少),道路周辺の光・熱環境の改善,歩行空間の快適性向上(新規効果),が見込まれる。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (6 results)

All 2018 2017 2016

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (5 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Development of Two New Types of Retroreflective Materials as Countermeasures to Urban Heat Islands2017

    • Author(s)
      Hideki Sakai, Hiroyuki Iyota
    • Journal Title

      International Journal of Thermophysics

      Volume: 38 Issue: 9 Pages: 131

    • DOI

      10.1007/s10765-017-2266-y

    • NAID

      120006528654

    • URL

      https://ocu-omu.repo.nii.ac.jp/records/2019918

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Presentation] 日射反射率及び透過率等の計算に用いる基準太陽光の規格間比較2018

    • Author(s)
      酒井英樹
    • Organizer
      日本ヒートアイランド学会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Non-contact colorimetric measurement using dome illumination for complex shape objects2018

    • Author(s)
      Hideki Sakai, Mai Isomi, Hiroyuki Iyota
    • Organizer
      the 4th Asian Color Association Conference (ACA2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ドーム型照明を用いた非接触式測色システムによる塗膜面の屋外暴露試験試料評価2018

    • Author(s)
      酒井英樹
    • Organizer
      日本色彩学会環境色彩研究会第17回発表会
    • Related Report
      2017 Research-status Report
  • [Presentation] 塗膜防水材料及び滑り止め材料の日射再帰反射特性の簡易評価2017

    • Author(s)
      酒井英樹
    • Organizer
      日本ヒートアイランド学会第12回全国大会
    • Related Report
      2017 Research-status Report
  • [Presentation] Development of Two New-Type Retroreflective Materials as Countermeasures to Urban Heat Islands2016

    • Author(s)
      Hideki Sakai, Hiroyuki Iota
    • Organizer
      11th Asian Thermophysical Properties Conference (ATPC2016)
    • Place of Presentation
      Pacifico Yokohama (Kanagawa, Yokohama)
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research

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Published: 2016-04-21   Modified: 2020-03-30  

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