| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a musical instrument including a member composed of a cement hardening object, as a body of a stringed instrument, or a tube section of a wind instrument, or the like. <P>SOLUTION: The musical instrument includes the member consisting of the cement hardening object in which a thickness is 1 to 6 mm, a density is 2.50 to 2.60 g/cm<SP>3</SP>, an elasticity coefficient is≥50 kN/mm<SP>2</SP>, and a compression intensity is≥180 N/mm<SP>2</SP>. A compound which constitutes the cement hardening object includes (A) cement, (B) fine powder with a BET(Brunauer, Emmett and Teller) specific surface is 5 to 25 m<SP>2</SP>/g, (C) fine aggregate, (D) water reducing agent, (E) metal fabric and (F) water. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
