Resources Recycling (자원리싸이클링)

The Korean Institute of Resources Recycling (한국자원리싸이클링학회)
권호 표지
DOI QR코드

DOI QR Code

Grouting Properties using Thixotropic Material and Vibration Impact Method

가소성 그라우트 재료와 진동 및 충격을 부여하는 공법에 의한 지반개량 특성

  • Received : 2023.12.19
  • Accepted : 2024.01.22
  • Published : 2024.02.28
Download PDF
⟨ Previous Next ⟩

Abstract

In grouting, the LW method is commonly employed to induce the gelation of cementitious material using water glass, thereby restricting the extent of material injection. Nevertheless, challenges manifest when materials are lost before gelation, particularly in regions with high groundwater flow rates or significant subsurface voids. This study developed a thixotropic grout material using LFS and GGBFS to mitigate material loss during injection, with an assessment of its flow characteristics, durability in marine exposure, strength, and injection properties. The outcomes revealed that the thixotropic grout material exhibited flow ranging from 105 to 143 mm and enhanced strength and durability compared to the LW method. Furthermore, field tests substantiated that applying vibration and impact improved impermeability.

그라우팅 공사에서 재료의 주입범위를 제한하기 위해 사용되는 대표적인 공법은 약액을 사용하여 시멘트계 재료의 겔화를 유도하는 LW법(Labiles waterglass method)으로 이는 다양한 환경에서 사용되고 있으나 지하수의 유속이 빠르거나 지반 내 공극이 큰 경우 겔이 되기 전 재료가 유실되는 문제가 발생한다. 본 연구에서는 주입 시 유실을 최소화 하기 위하여 전기로환원슬래그 및 고로슬래그를 활용하여 가소성 그라우트재료를 제조하였으며 유동성, 강도특성, 해수 침지에 의한 내구성 및 주입성능을 검토하였다. 실험 결과, 가소성 그라우트 재료는 배합에 따라 105~143mm의 유동성을 가지며, LW법 대비 강도 및 내구성이 향상된 결과를 확인하였다. 또한 진동 및 충격을 부여하는 공법을 함께 적용하여 일반공법 대비 차수효과가 개선됨을 확인하였다.

Keywords

Acknowledgement

본 논문은 국토교통과학기술진흥원의 국토교통지역혁 신기술개발사업(과제번호 : RS-2022-00143830)의 연구비 지원에 의해 수행되었으며 이에 감사드립니다.

References

  1. Kikwan Choi, 2002 : Effect reinforce of reservoir bankment by use LW method, Chosun Univ., pp.4-25.
  2. Juwan Kim, 2013 : Case study on the effectiveness of injection in LW grouting, Pukyong National Univ., pp.4-18.
  3. Haseog Kim, Keeseok Kim, Bonghyum Baek, et al., 2022 : Properties of grout material for seawall using slags from steel making industry, J. of Korean Recycled Construction Resources Institute, 10(4), pp.523-530.
  4. Soyeal Lee, Sekyung Choi, Ilhan Jeong, 2010 : The verification of the application of grouting in the bottom peotection work of sea dikes in the field, KGS Fall National Conference, pp.29-39, Korean Geotechnical Society, 9-10 September 2010, Ansan Korea.
  5. Sunmi Choi, 2022. KR. 10-2422247.
  6. Jinman Kim, Sunmi Choi, Jiho Kim, 2012 : Evaluation for allicability as the inorganic binder with rapid setting property for construction meterial of LFS produced from various manufacturing process, J. of Korean Recycled Construction Resources Institute, 7(2), pp.70-77.
  7. Changwoo Hong, Wonkyung Jeong, Kyeongjin Kim, 2006 : Study on fundamental properties of latex-modified concrete using blast-furnace slag, J. of Korea Institute of Resources Recycling, 15(2), pp.10-17.
  8. Hyungseok Kim, Yongdo Jo, Jihwan Ahn, et al., 2006 : Activation property of blast furnace slag by calcined alunite, J. of Korea Institute of Resources Recycling, 15(4), pp.27-35.
  9. KS F 2476, Stand ard test method for polymer-mod ified cement mortar.
  10. KS F 2328, Test method for compressive strengh of molded soil cement cylinders.
  11. KS D ISO 11306, Corrosion of metals and alloys - Guidelines for exposing and evaluating metals and alloys in surface sea water.
  12. Sungho Song, Jinyong Lee, 2009 : Vatiation of water quality of vrackish water resevoir and hydrogeologic characteristics of dike caused by embankment reinforcement, J. of the Korean Society for Geosystem Engineering, 46(3), pp.362-371.
  13. Hanyong Moon, Seungtae Lee, Hongsam Kim, 2001 : Evaluation on the deterioration and resistance of cement matrix due to seawater attack, J. of the Korea Concrete Institute, 13(2), pp.175-183.
  14. Sungyong Park, Honggen Shim, Heejin Kang, et al., 2017 : A study on hybrid grout material for reservoir embankment reinforecement, J. of Koream Geosynthertics Society, 16(3), pp.21-30.