ブリュースター角顕微鏡による界面活性剤系被膜養生剤の観察  [in Japanese] Observation of surfactant-based film-forming curing agent using Brewster angle microscope  [in Japanese]

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Abstract

<p>界面活性剤系被膜養生剤によるコンクリートの保水メカニズム解明のため,極薄の膜をもイメージ化できるブリュースター角顕微鏡を用いて,水面上の養生剤を観察した.養生剤は濃度が異なる5 種類を用意し,それぞれの滴下量増加に伴う水面の変化は動画にて確認した.その結果,濃度10% 以下の養生剤では半透明の膜が水面を覆った.一方17% 以上の養生剤では界面活性剤分子の集合体と考えられる物体が水面を覆った.既往の研究において低濃度の養生剤ほど蒸発が抑制されていたのは,今回確認した膜が寄与したためだと考えられる.</p>

<p>This study analyzes the water-retaining mechanism of surfactant-based curing agents. Curing agents on the water surface were observed with the help of a Brewster angle microscope, which is often employed for studying ultrathin films on liquid surfaces. Curing agents of various concentrations were prepared and instilled into pure water. The resulting surfactant effect on the water surface was subsequently observed. When a curing agent with concentration lower than 10% was instilled, the film spread over the water surface. However, when a curing agent with concentration higher than 17% was instilled, several lumps formed instead of a film, which primarily indicates aggregated surfactants. The film-forming process observed in this study indicates that curing agents having low concentrations can significantly suppress the rate of water evaporation.</p>

Journal

  • SEISAN KENKYU

    SEISAN KENKYU 71(1), 51-54, 2019

    Institute of Industrial Science The University of Tokyo

Codes

  • NII Article ID (NAID)
    130007584211
  • NII NACSIS-CAT ID (NCID)
    AN00127075
  • Text Lang
    JPN
  • Journal Type
    大学紀要
  • ISSN
    0037-105X
  • NDL Article ID
    029517363
  • NDL Call No.
    Z14-198
  • Data Source
    NDL  J-STAGE 
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