Development of New Micro-Cement Grouting Materials for Tunneling

터널 보강용 고성능 침투 주입재 연구개발

  • 임유진 (배재대학교 공과대학 건설환경공학과) ;
  • 이강호 (삼성물산 건설부문 품질경영본부) ;
  • 김형겸 (지산특수토건(주)) ;
  • 홍창수 (삼성물산 건설부문 기술본부) ;
  • 안준희 (지산특수토건(주))
  • Published : 2008.10.10

Abstract

A new grouting material named 3S is developed that can be used effectively for reinforcing cut surface of weathered rock in processing of tunneling. The new material is composed of mostly micro slag cement and general Portland cement, but the material is foundered again upto $8,000\;cm^2/g$ of specific area so that it can be easily infiltrated in to the ground. For verifying technical and engineering quality of the material several laboratory tests with specially designed test apparatus were performed including compression tests, infiltration tests and resonant column tests. It was verified that the newly developed grouting material at early age of 1 or 3 days generates 200~1500% higher compressive strength and 400~560% larger elastic modulus than those of the LW(LW-1) or micro-cement(LW-2) grouting materials in the market. In addition, the new 3S grouting material could be so easily infiltrated into the model ground in the lab tests that it produces 4 times larger grouted roots in average compared to the usual water glass type grouting material(LW-1). Thus, it can be said that the newly developed grouting material can effectively prevent inflow water into tunnel compared to LW grouting materials.

Keywords