| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide segregation resisting type cavity packing material most suitable for a material packing cavity generated at shield work, jacking work, lining work of first digging of tunnel work, in packing a cavity of a tunnel back or a bomb shelter and in digging at reclamation, etc., and easily usable for these works, by using concrete micro-powder having self hardening property, effect of preventing bleeding and property capable of giving viscosity, as well as property strong against dry shrinkage, as an admixture, for a cement mixture of comparatively low strength recipe. SOLUTION: The segregation resisting type cavity packing material is manufactured by mixing ground concrete micro-powder and cement at a prescribed ratio.</p> |
