| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a concrete slab having high sound insulation and/or floor impact sound reduction performance. <P>SOLUTION: A sound insulation concrete slab comprises a low-strength concrete layer disposed on one side of the concrete slab and a high-strength concrete layer disposed on the other side thereof. <P>COPYRIGHT: (C)2013,JPO&INPIT |
