[V-578] Examination of Durability of Concrete Coated with Various Surface Pentrants Exposed for a long time

〇Tomoki Nagoya¹, Kanta Miyazaki¹, Takeshi Iyoda¹ (1.Shibaura Institute of Technology)

[V-579] Mortar bar test results of concrete with different fly ash substitution rate for about 10 years.

〇SHUJI Yamashita¹, HISAKO Kobayashi², SHIGENOBU Iguchi² (1.JR East Consultants, 2.JR East)

[V-580] Influence of Air Hole Distance and Air Humidity on Humidity Reduction of Pier Concrete

〇Shusuke Tatsu¹, Hajime Itoh¹, Arata Shirakami², Yasunari Hosono³ (1.Toyama Prefectural University, 2.Hokuden Engineering Consultants, 3.IPEC)

[V-581] Influence of water and prediction of steel corrosion in surface-coated reinforced concrete structures

〇Kyohei Karasawa¹, Koji Yoshida¹, Yutaka Negishi¹, Ryuichiro Kakinouchi¹ (1.Central Japan Railway Company)

[V-582] Performance check method of water stoppage material in open tunnel

〇konishi shinzi¹, Koshiba Kohei¹, Morohahsi Yuzi¹, Chiba Takuya¹, Watanabe Sdayuki², Ogura Norihiko³, Konishi Yuzi³ (1.TokyoMetro, 2.Metro Rail Facilities, 3.Core Research Institute)

[V-583] Methods of the evaluation system of the concrete repair materials suitable for cut and cover tunnels

〇Masumi Taguchi¹, Sachie Nakamura¹, Kohei Koshiba¹, Shinji Konishi¹, Sadayuki Watanabe², Toru Iizima³ (1.Tokyo Metro Co., Ltd., 2.Metro Rail Facilities Co., Ltd., 3.JR souken engineering Co., Ltd.)

[V-584] Effectiveness research about the stabilizing treatment agent of protective rust layer

〇MIKIO KUWAHARA¹, SHINICHI MIURA² (1.DAI NIPPON TORYO CO.,LTD., 2.JFE Steel Corporation)

[V-585] 4-year progress report of a weatherproof steel bridge that has been repair-painted with rust left on the foundation

〇Misato Yonehara¹, Seiji Hurukawa¹, Yasushi Ishikawa¹ (1.West Nippon Expressway Engineering Shikoku Co.Ltd.)

[V-586] Improvement of the filtration method of the filtration unit in the ZINRYO vehicle ward

〇takafumi yamaguchi¹ (1.central japan railway company)

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