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Geomechanics and Engineering Volume 33, Number 2, April25 2023 , pages 211-219 DOI: https://doi.org/10.12989/gae.2023.33.2.211 |
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Ultrasonically enhancing flowability of cement grout for reinforcing rock joint in deep underground |
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Junho Moon, Inkook Yoon, Minjin Kim, Junsu Lee and Younguk Kim
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| Abstract | ||
| This study analyzes the changes in the physical properties of grout by irradiating it with ultrasonic energy and assesses the injectability of the grout into deep rock fractures. The materials used in the research are OPC (Ordinary Portland Cement) and MC (Micro Cement), and are irradiated depending on the water/cement ratio. After irradiating the grout with ultrasonic energy, viscosity, compressive strength, and particle size are analyzed, and the results of the particle size analysis were applied to Nick Barton's theory to evaluate the injectability of the grout into deep rock fractures under those conditions. It was found that the viscosity of the grout decreased after ultrasonic wave irradiation, and the rate of viscosity reduction tended to decrease as the water/cement ratio increased. Additionally, an increase in compressive strength and a decrease in particle size were observed, indicating that the grout irradiated with ultrasonic energy was more effective for injection into rock fractures. | ||
| Key Words | ||
| cavitation; deep underground; grout; rock fissures; ultrasonic wave | ||
| Address | ||
| Junho Moon, Inkook Yoon, Minjin Kim, Junsu Lee and Younguk Kim: Department of Civil and Environmental Engineering, Myongji University, 116 Myongji-ro, Cheoin-gu, Yongin-si, Gyeonggi-do 17058, Republic of Korea | ||