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Report No.
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Investigation of the distributed grout material in the vicinity of a fracture

Matsui, Hiroya; Takahashi, Kazuharu*; Yui, Mikazu

JAEA has been studied the development of grouting technology in deep geological environment as a contract study from MTTI. As a part of this project, the investigation of distributed grout material in the vicinity of a fracture. In this investigation, a core with fracture filled in grout material was sampled and sliced. Then, sliced rock was analyzed by XRF, EPMA and three dimensional shape of filled grout in the fracture was reconstructed. The results suggested that ordinary portland cement can penetrate in a fracture with several ten micro meter aperture and averaged aperture of analyzed fracture is about 4.5 mm. Also, the methodology to understand the grout distribution in fracture scale was proposed.

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