| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a back filling material which does neither heave a liner when injected nor cause a weak part on the hardened body to be formed and favorably manifests adhesive and compressive strength at the part to place concrete in contact with the hardened concrete when dividedly injected and to provide an executing method for injecting the back filling material. SOLUTION: This back filling material is obtained by mixing a main material liquid (liquid A) containing hydraulic cement excluding alumina cement with a hardening material liquid (liquid B) containing alumina cement and II type anhydrous gypsum at the specific ratio so that the total mass of the alumina cement and the II type anhydrous gypsum in the mixed liquid of liquids A and B has the specific ratio to the total mass of the hydraulic cement, the alumina cement and the II type anhydrous gypsum or the total mass of the tempered water of liquids A and B in the mixed liquid has the specific ratio to the total mass of the hydraulic cement, the alumina cement and the II type anhydrous gypsum.</p> |
