| abstract |
The present invention relates to a composition for back filling grout comprising cement, limestone, calcium sulfur aluminate, bentonite, anhydrous gypsum, polycarboxylate, zinc stearate, film-forming acrylic powder and admixtures as active ingredients.n n n The back filling grout according to the present invention has fine particles and excellent fluidity and is easy to inject, and no material separation occurs during long distance transfer, and hardly causes bleeding during curing. And it is easy to maintain the tunnel, and the compressive strength is improved, and can effectively prevent ground sedimentation can be useful as a tunnel backfill filler.n n n n Grout, Tunnel Maintenance |