| 摘要 |
PROBLEM TO BE SOLVED: To provide an alumina cement grout composition having high acid- resistant and the development of strength, without volume shrinkage during hardening and further, obtaining same workability as a general cement grout material for a grout technique. SOLUTION: The grout composition comprises a weight ratio of fine aggregate to alumina cement in the range from 70 to 30 to 60 to 40, in which the alumina cement has a content of 25 wt.% or less for the fine aggregate and the grain having a grain size of 5 μm or less, and further, a powdered grain type material which forms an expansibility gas by reacting with water. |
