| 摘要 |
PURPOSE:To raise the strength of concrete without leaving air bubble traces in the surface layer of the concrete by a method in which a porous material is bonded to the inversely sloped face of a metal form, concrete is placed, air bubbles in the concrete placed are allowed to rise, and excessive water in the concrete is flowed down. CONSTITUTION:A form timbering 5 is laid through bolts 51 and 52 on concrete 4 placed dividedly in serveral layers, a metal form 1 is fixed to the timbering 5, a porous material 2 is bonded to the inversely sloped face 11 of the metal form 1, and concrete 6 is placed. Air bubbles A in the concrete 6 go up under the inversely sloped form face 7 of the concrete 6 and air bubbles 7 rise in the porous material 2, and thereby no air bubbles are left in the surface layer of the concrete 6. Excessive water of the concrete 6 flows out on the inclined face of the concrete 4 already placed by the absorptive action of the porous material 2 to increase the strength of the concrete 6. |
