| abstract |
(57) [Summary] [Purpose] It can be pumped by a pipeline, has a large initial strength development, can obtain higher strength, does not cause a volume change even under the condition of changing groundwater level, and deteriorates for a long time. Provided is a two-component backfill material that does not have the risk of [Composition] A plastic mixture of a solution A composed of a sand mortar in a high-concentration slurry to which a stabilizer composed of an organic acid and a water-soluble carbonate is added, and a solution B composed of sodium silicate, and a solution A of 1 m per 3, cement 200～300Kg, clay and / or bentonite 50～80Kg, sand 900～1100Kg, water 500 〜600kg, and stabilizer 1.0〜12.5kg, A liquid and B A backfill material that is mixed with liquid at a volume ratio of 100: 5 to 15. |