INFLUENCE OF KIND OF DEICER AND TEMPERATURE DROP AND RISE BELOW LOW TEMPERATURE ON SALT SCLAING RESISTANCE OF MORTAR

DOI IR Web Site 1 References Open Access
  • TANAKADATE Yuto
    IWATE UNIVERSITY, Graduate School Student（4-3-5, Ueda, Morioka-shi, Iwate 020-8551, Japan）
  • HANEHARA Shunsuke
    IWATE UNIVERSITY, Faculty of Science and Engineering（4-3-5, Ueda, Morioka-shi, Iwate 020-8551, Japan）

Bibliographic Information

Other Title
  • 凍結防止剤の種類および低温下における降温と昇温がソルトスケーリングに及ぼす影響

Search this article

Description

<p>In recent year, concrete deterioration of surface due to scaling has been becoming heavier with increase of scattering amount of deicer in road structure. According to the previous researches which reported about characteristic of salt scaling, it is suggested that the freezing and thawing process of deicer solution on the concrete surface affects salt scaling. In order to elucidate the effect of the freezing and thawing process of the deicer solution on the scaling, we conducted repeated tests of temperature drop and temperature rise in various temperature ranges from －30 to －5 degrees centigrade below the freezing point of deicer solutions. The deicer solution was an aqueous solution of NaCl, KCl, CH3COONa and CH3COOK in this study. The results obtained that temperature range at which scaling occurs differs depending on the kind of deicer solution. In all deicer solutions, the temperature range at which scaling occurs is between the freezing point and the eutectic point of each deicer solutions. In this temperature range, deicer solution state is a mixture of pure ice and high-concentration deicer solution. On the other hand, scaling did not occur below the eutectic point of deicer solution, at which deicer solution state is a mixture of pure ice and crystal of deicer. Therefore, scaling occurs due to the phenomenon that part of high-concentration deicer solution freezes and thaws with temperature changing.</p>

Journal

References(1)*help

See more

Related Projects

See more

Keywords

Details 詳細情報について

Report a problem

Back to top