| 摘要 |
PROBLEM TO BE SOLVED: To provide aggregate for concrete having high compressive strength after application and high fluidity upon the application, whose production cost is low, and further having chemical stability and durability over a long period, to provide a method for producing the same, and to provide glass ball-containing concrete. SOLUTION: The aggregate for concrete is made of alkali-free glass, and is almost a spherical body with a grain size of 5 to 100 mm. The method for producing the aggregate for concrete comprises: a sorting stage where an alkali-free glass base material is sorted from FRP (Fiber Reinforced Plastics) scrap material; a melting stage where the sorted alkali-free glass base material is heated and melted; and a molding stage where the melted glass is molded, so as to be an almost spherical shape with prescribed dimensions. Also disclosed is concrete comprising the above aggregate for concrete. COPYRIGHT: (C)2008,JPO&INPIT
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