| 摘要 |
PURPOSE:To efficiently perform the chipping work of hardened concrete to a predetermined level by providing a sheet material hardly stickable to concrete, having a large number of holes, on the place to be chipped of the concrete when concreting period. CONSTITUTION:When constructing a structure by equilizing the strength of the structure by the placement of concrete following the removal of the upper end part of concrete placed in the lower part, coarse aggregate 1 is charged into a formwork 4 erected on the seabed ground 9 and then cement mortar or paste 7 is charged into the apertures of the coarse aggregate 1 through an injection tube 3 to form the lower concrete part. In this case, a sheet material 5 hardly stickable to concrete and having a large number of holes 6 of a given size is placed on the upper part to be chipped of the lower concrete part. By this, the strength of the concrete joint part during concreting work can be raised. |
