塩化カルシウム溶液散布による路面すべり摩擦係数の低下

Material type: 文書・図像類

Author: 藤本 , 明宏ほか

Publisher: 公益社団法人土木学会

Publication date: 2021-02-02

Material Format: Digital

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Note (General)：: 本研究では，凍結防止剤として溶液散布された塩化カルシウムによる路面すべり摩擦係数μの低下を調べるために，密粒度アスファルト混合物とポーラスアスファルト混合物を対象に室内実験および野外実験を実施した．室内実験では，塩化カルシウム溶液を散布した路面のすべり抵抗値と塩化カルシウムを析出させた後に散水した路...

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Material Type: 文書・図像類
Title: 塩化カルシウム溶液散布による路面すべり摩擦係数の低下
Author/Editor: 藤本 , 明宏
Fujimoto, Akihiro
Author Heading: 藤本 , 明宏
Fujimoto, Akihiro
Publication, Distribution, etc.: 公益社団法人土木学会
Publication Date: 2021-02-02
Publication Date (W3CDTF): 2021-02-02
Alternative Title: REDUCTION OF ROAD FRICTION COEFFICIENT CAUSED BY THE APPLICATION OF CALCIUM CHLORIDE SOLUTION
Periodical title: 土木学会論文集E1（舗装工学）
No. or year of volume/issue: 76 2
Volume: 76
Issue: 2
Pages: 1_101-1_108
Text Language Code: jpn
Subject Heading: antifreezing agent
calcium chloride
road friction coefficient
salt precipitation
Target Audience: 一般
Note (General): 本研究では，凍結防止剤として溶液散布された塩化カルシウムによる路面すべり摩擦係数μの低下を調べるために，密粒度アスファルト混合物とポーラスアスファルト混合物を対象に室内実験および野外実験を実施した．室内実験では，塩化カルシウム溶液を散布した路面のすべり抵抗値と塩化カルシウムを析出させた後に散水した路面のすべり抵抗値をそれぞれ測定した．その結果，塩化カルシウム溶液散布直後のμは，たとえ高濃度で散布してもいずれも0.4以上あり，湿潤状態の値と大差がなかった．一方，塩化カルシウムが路面に析出した場合，密粒度アスファルト混合物とポーラスアスファルト混合物ともにμは湿潤路面のそれより0.2程度低くなった．さらに，野外実験から塩化カルシウムの析出やそれに伴うμの低下は実際の道路でも起こり得ることを示した． We conducted laboratory and field experiments on dense-graded asphalt concrete and porous asphalt concrete in order to clarify the decrease in road friction coefficient μ caused by calcium chloride solution sprayed as an antifreezing agent. In the laboratory experiment, the skid resistance of road specimens sprayed with calcium chloride solution and that of road specimens sprinkled with water after the calcium chloride precipitated were measured. The values of μ immediately after the application of calcium chloride solution, even a high-concentration solution, were found to be at least 0.4, which is not much different from the values for the wet road surface. When calcium chloride precipitated on the road surface, the values of μ for dense-graded asphalt concrete and porous asphalt concrete were about 0.2 lower than those for the wet road surface. Furthermore, field experiments showed that the precipitation of calcium chloride and decreases in μ associated with that precipitation could occur on actual roads
source:https://www.jstage.jst.go.jp/article/jscejpe/76/2/76_I_101/_article/-char/ja/
Access Restrictions: 限定公開
Related Material (DOI): 10.2208/jscejpe.76.2_I_101
Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）
https://irdb.nii.ac.jp
Original Data Provider (Database): 福井大学 : 福井大学学術機関リポジトリ