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非破壊CT-XRD連成法による花崗岩割れ目部分に注入したグラウトの観察

Observation of grouting material in fractured granite by non-destructive integrated CT-XRD method

人見 尚*; 梶原 堅太郎*; 杉山 隆文*; 佐藤 稔紀  

Hitomi, Takashi*; Kajiwara, Kentaro*; Sugiyama, Takafumi*; Sato, Toshinori

高レベル放射性廃棄物の地層処分技術に関する研究開発の一環として、坑道の覆工や止水のためのグラウト材料の岩盤への影響について研究を行っている。大規模放射光施設のX線源を用い、非破壊で供試体内部の変質状況をX線CTで把握し、注目する微小領域のX線回折を行う、非破壊CT-XRD連成観察法を開発した。本報告では、この観察法をグラウト材を注入した花崗岩の割れ目部分に適用し、構成鉱物やグラウトの構成材について観察し、同手法の有効性を確認した結果を示す。

As a part of research and development of high-level radioactive waste disposal, the effect upon rocks of grouting materials, which are used lining of galleries and water stopping, are studied. Non-destructive integrated CT-XRD method was developed, that is consist of X-ray CT observation and X-ray diffraction of test pieces using X-ray source of large scale synchrotron radiation facility. This report described the effectiveness of this observation method that is applied to observation of constitution minerals of the rock and the grout about a crack part of the granite which was injected grout materials.

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