| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a fireproof concrete which can prevent damage of a surface layer part thereof caused by explosive fracture. <P>SOLUTION: The fireproof concrete 1 is produced by blending cement 9, fine aggregate 2, coarse aggregate 7, water, organic fibers 4 vaporizing at a prescribed temperature (a temperature that the concrete 1 is assumed to reach in case if fire or the like, e.g. about 250 to 500°C), an admixture 5 for improving the separation resistance of the material, and steel fibers 6 for improving the tenacity of the concrete 1 after hardening at a prescribed ratio. The aspect ratio being a ratio of length to thickness of the organic fiber 4 is in the range of 410 to 700. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
