It is important to consider the closure of cracks and pores in rock for radioactive waste disposal and carbon capture and storage to maintain or decrease the permeability of rock. In this study, we investigated the precipitation of calcium compounds on the rock surface in calcium hydroxide solution to consider whether sealing of pores and cracks is possible and accelerated or not. It was found that the precipitation of calcium compounds occurred on rock surfaces. Additionally, we found that the closure of cracks and pores in rock occurred from the P-wave velocity measurement and observation by the scanning electron microscope. Since the closure of cracks and pores can decrease the permeability in rock, it is concluded that the precipitation of calcium compounds on rock is useful for the geological disposal of radioactive wastes and carbon capture and storage.


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  1. Gueguen, Y. and Dienes, J.
    [1989] Transport properties of rocks from statistics and percolation. Mathematical Geology, 21, 1–13.
    [Google Scholar]
  2. Fukuda, D., Maruyama, M., Nara, Y., Hayashi, D., Ogawa, H. and Kaneko, K.
    [2014] Observation of fracture sealing in High-strength and Ultra-low-permeability concrete by micro-focus X-ray CT and SEM/EDX. International Journal of Fracture, 188, 159–171.
    [Google Scholar]
  3. Nara, Y., Kato, H., Yoneda, T. and Kaneko, K.
    [2011] Determination of three-dimensional microcrack distribution and principal axes for granite using a polyhedral specimen. International Journal of Rock Mechanics and Mining Sciences, 48, 316–335.
    [Google Scholar]

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