| 摘要 |
PURPOSE:To shorten the term of construction and save a construction cost by placing ultrahigh-speed hardening bubble mortar formed with ultrahigh-speed hardening cement, in the shape of a layer, on the rear surface of a bridge stand, a retaining wall, or the like set on ground, and by back-filling without forms. CONSTITUTION:On the rear surface of the wall body 1 of a bridge stand, a retaining wall, or the like set on ground 2, ultrahigh-hardening bubble mortar 3 with a hardening time regulated with setting retarder is placed in the state of a layer. On the placing, work is quickly executed without forms, and the reduction of a capacity after the placing is eliminated, and settling and shrinking are contrived not to be generated. Besides, the bubble mortar may be the partial component of ultrahigh-speed hardening cement substituted for fly ash and blast furnace slag. As a result, back-filling can be economically performed in a short time. |
