| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a manufacturing method for a concrete product by which air bubbles do not remain even at an area where air bubbles are hard to be removed by a conventional manufacturing method, and indents of air bubble marks rarely exist on the surface of the concrete product, i.e., repairs are hardly required. <P>SOLUTION: This manufacturing method for the concrete product uses a mold constituted of an outer mold and an inner mold. In the manufacturing method, concrete is laid in the outer mold, and the inner mold is sunk in the laid concrete. <P>COPYRIGHT: (C)2004,JPO |
