| 摘要 |
PROBLEM TO BE SOLVED: To provide a grout composition from which grout mortar having the flowability adequate to be packed in a clearance of a structure can be obtained and a grout-hardened body, that has shrinkage accompanying a difference of environmental temperature, adequate expansion accompanying no excessive expansion and necessary and sufficient compressive strength and is excellent when integrated with the structure, can be formed.SOLUTION: The grout composition contains 100 pts.mass of Portland cement, 100-200 pts.mass of fine aggregate, 1-10 pts.mass of an inorganic expanding material, 0.0014-0.0027 pt.mass of aluminum fine powder and a fluidizing agent. The aluminum fine powder has 0.60-0.94 m/g water surface diffusion area. A production method of the aluminum fine powder comprises a pulverization step of adding aliphatic acid to an aluminum foil-containing raw material as a pulverization assistant and pulverizing the aliphatic acid-added raw material but does not comprise an oil content removal step in succeeding steps. |
