@article{oai:iwate-u.repo.nii.ac.jp:00015713,
 author = {田中舘, 悠登 and 羽原, 俊祐},
 issue = {1},
 journal = {セメント・コンクリート論文集, Cement Science and Concrete Technology},
 month = {Mar},
 note = {凍結防止剤溶液の凍結と融解過程がスケーリングに及ぼす影響を明らかにするため、種々の凍結防止剤溶液の凝固点以下－30～－5℃において、様々な温度範囲で降温と昇温を繰り返し行った。凍結防止剤の種類によってスケーリングが起こる温度域が異なる結果となった。全ての凍結防止剤溶液において、スケーリングが起こる温度域は凝固点と共晶点の間であり、純氷と高濃度の凍結防止剤溶液が混在する状態である。一方、凍結防止剤の結晶と純氷の2成分の固体状態である共晶点以下では、スケーリングは起こらなかった。温度変化に伴い凍結防止剤溶液の一部分において凍結と融解が起こることにより、スケーリングが起こると考えられる。, 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.},
 pages = {244--250},
 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},
 volume = {73},
 year = {2020}
}