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Oral presentation

In-tunnel spraying test of the low-alkaline super shotcrete, 2; Mixing test to choose concrete mix proportion

Iwasaki, Masahiro*; Murokawa, Takamitsu*; Kobayashi, Shinji*; Ishii, Takashi*; Kusano, Takashi*; Kurita, Kazuaki*; Yamawaki, Hiroyuki; Sato, Toshinori

no journal, ,

no abstracts in English

Oral presentation

In-tunnel spraying test of low-alkali quick setting shotcrete, 3; Shotcreting test, support performance verification test

Nakaya, Atsushi*; Tada, Hiroyuki*; Okuyama, Yasuji*; Iwasaki, Masahiro*; Kusano, Takashi*; Kubo, Yohei*; Yamawaki, Hiroyuki; Sato, Toshinori

no journal, ,

no abstracts in English

Oral presentation

Change of interface between shot crete and granitic rock under long-term immersion environment

Takemura, Takato*; Matsui, Hiroya; Saito, Ryo*; Tada, Hiroyuki*; Iwasaki, Masahiro*; Mishima, Shunichi*; Sato, Haruo*

no journal, ,

Generally, a shotcrete use as the support of a tunnel to keep the stability. However, the condition of interface between a shotcrete and rock mass is unknown. Therefore, a laboratory tests under long-term immersion environment has been carried out to understand the mechanism of the change the interface. This report summarize the knowledges during the laboratory tests.