| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a concrete product that does not produce loud noise that would be produced when vibrations are imparted by a table vibrator and which makes the surface of a concrete product smooth without reducing much the volume of air captured in the concrete product. SOLUTION: While placing ready-mixed concrete in a form 1, the form 1 is reciprocated by a driving device 13 in such a manner that the ready-mixed concrete 10 placed therein is shaked to wave, whereby a mortar layer is formed in such a manner as to adhere to inner wall surfaces 1c, 1d of the form 1 which become visible and invisible when the ready-mixed concrete 10 placed therein waves. A concrete product covered with the motar layer so formed is free from bubbles appearing in the surface thereof and therefore can have a smooth surface. |
