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http://dx.doi.org/10.12925/jkocs.2019.36.4.1281

Removal of calcium chloride in road structure using ultra-fine bubble washing machine  

Park, Gun-Il (Pyunghwa Engineering Consultants Ltd. R&D Institute)
Lee, June-Hyung (Pyunghwa Engineering Consultants Ltd. R&D Institute)
Park, Hyung-Jun (Pyunghwa Engineering Consultants Ltd. R&D Institute)
Kim, Hyun-Jin (Pyunghwa Engineering Consultants Ltd. R&D Institute)
Kim, Heung-Rae (Pyunghwa Engineering Consultants Ltd. R&D Institute)
Cho, Il Hyoung (Global Top Engineering partner Ltd.)
Publication Information
Journal of the Korean Applied Science and Technology / v.36, no.4, 2019 , pp. 1281-1289 More about this Journal
Abstract
This study was conducted to evaluate the optimal operating condition of ultra-fine bubble washing machine for removing calcium chloride from road concrete structure. The diameter of the ultra-fine bubble was measured to 196.6 ± 100.6 nm and the ultra-fine bubble concentration was measured to 1.36 × 108 cell/ml. As a result of the performance on the spray device of the washing machine, it was confirmed that the washing efficiency of 93% and 91% appeared at 100cm and 150cm of injection distance at 100bar injection pressure. By increasing the ultra-fine bubble generation cycles from 2 to 6, the chloride removal rate increased from 1% to 7%. As the ultra-fine bubble generation air flow was lowered from 4 ml/min to 0.5 ml/min, it was confirmed that the washing efficiency increased up to 30%. The washing efficiency of ultra-fine bubble water was 25% higher than normal water.
Keywords
Road structure; concrete; calcium chloride; ultra-fine bubble; washing machine;
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