Complete slaking collapse of dike sandstones by fresh water and prevention of the collapse by salt water

Fujii, Yoshiaki; Saito, Shiori; Oshima, Teppei; Kodama, Jun-ichi; Fukuda, Daisuke; Sakata, Shokichi; Uchida, Kagemi; Matsumoto, Hiroyuki; Dassanayake, Anjula B.N.

Complete slaking collapse of dike sandstones by fresh water and prevention of the collapse by salt water

Fujii, Yoshiaki; Saito, Shiori; Oshima, Teppei et al.

International Journal of Rock Mechanics and Mining Sciences, 2020, 131, 104378

Permalink : https://hdl.handle.net/2115/86202

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アクセス権	open access
URI	https://hdl.handle.net/2115/86202
タイトル	Complete slaking collapse of dike sandstones by fresh water and prevention of the collapse by salt water
著者	Fujii, Yoshiaki ; Saito, Shiori ; Oshima, Teppei ; Kodama, Jun-ichi ; Fukuda, Daisuke ; Sakata, Shokichi ; Uchida, Kagemi ; Matsumoto, Hiroyuki ; Dassanayake, Anjula B.N.
e-Rad_Researcher 70192309 著者名 Fujii, Yoshiaki
著者名 Saito, Shiori
著者名 Oshima, Teppei
e-Rad_Researcher 70241411 著者名 Kodama, Jun-ichi
e-Rad_Researcher 80647181 著者名 Fukuda, Daisuke
著者名 Sakata, Shokichi
著者名 Uchida, Kagemi
著者名 Matsumoto, Hiroyuki
著者名 Dassanayake, Anjula B.N.
言語	英語
キーワード	Dike sandstone
	Slaking
	Smectite
	Salt water
	Needle penetrating resistance
発行日	2020-07
出版者	Elsevier
収録物名	International Journal of Rock Mechanics and Mining Sciences
巻(号)	131
ページ	104378
抄録	Slaking is a well-known process, in which the surface of rock masses consisting of rocks such as mudstone, shale, etc. show rapid and complete disintegration when they are subjected to drying and then wetting with fresh water. On the other hand, dried sandstones even if they contain clay minerals such as smectite, etc., usually do not exhibit complete disintegration when they are soaked in fresh water. Instead, they usually show a strength decrease. Their slaking durability is tested by rotating them in a drum which is partially immersed in fresh water and eventually measuring the decrease in weight. On the other hand, it was found that some of the Paleogene sandstones from Kushiro Coal Mine in Japan, were completely disintegrated when they were immersed in fresh water followed by drying, but they were not collapsed when saline water was used instead of the fresh water. It was also shown that sandstones containing calcite did not show the complete breakdown even in fresh water. To understand the complete collapse of sandstones in fresh water and prevention of the collapse by salt water, sandstones sampled from Neogene dikes and Cretaceous at the mine were immersed in pure and salt water with Shikotsu welded tuff for comparison. Only dike sandstones showed a complete collapse in pure water and 3% salt water. Dike sandstone further showed severe time-dependent damage in salt water whose salinity was less than 7%. The results were explained by the dissolution of halite, swelling pressure of montmorillonite, osmotic pressure, etc.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
権利情報	Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
権利情報	©2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
PISSN	1365-1609
NCID	AA1116472X
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1016/j.ijrmms.2020.104378