透水性型枠によるコンクリートの細孔構造の変化と耐久性の向上 Changes in Pore Structure and Enhanced Durability of Concrete by the Use of Permeable Forms

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It is quite a while since permeable forms were developed and put to practical use, aiming at improving the durability of concrete by means of preventing airs and honeycombs from forming on these concrete surface. Permeable forms are designed to drain excess water contained in the concrete immediately after their placement. Removal of excess water not only decrease the water-cement ratio of the surface concrete, but increases the density of the concrete, and eventually enhances its durability.<BR>However, few studies focus on the characteristics of pore structure, namely, the relationship between changes in the volume and distribution of capillary pore and the durability of concrete by the use of permeable forms. In this study, investigations were made paying attention to changes in pore structure on past data obtained from tests conducted on permeable forms. The data include pore size distribution, cement volume distribution, depth of accelerated neutralization, salt infiltration and surface strength. The investigations led to the following findings : <BR>1) Use of permeable forms decrease the percentage of pore volume, especially that ranging between50 nm and 2μm.<BR>2) In the case of pore size ranging between 50 nm and 2μm, correlations can be seen between the decrease in pore volume and such properties as neutralization, salt infiltration and surface strength.

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  • コンクリート工学論文集 = Concrete research and technology  

    コンクリート工学論文集 = Concrete research and technology 8(1), 171-178, 1997-01-17 

    公益社団法人 日本コンクリート工学会

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各種コード

  • NII論文ID(NAID)
    10002755157
  • NII書誌ID(NCID)
    AN1053282X
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    13404733
  • NDL 記事登録ID
    4227966
  • NDL 雑誌分類
    ZN1(科学技術--建設工学・建設業)
  • NDL 請求記号
    Z16-2259
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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