| 摘要 |
PROBLEM TO BE SOLVED: To obtain an open pore type porous glass sintered body having a specified apparent porosity, a specified bulk specific gravity and a specified bending strength by sintering granules obtained by crushing recovered glass articles by way of an inorganic binder. SOLUTION: The sintered body has 25-40% apparent porosity, a bulk specific gravity of 1.0-1.3 and 50-100 kgf/cm2 bending strength. A mixture of 100 pts.wt. granules obtained by crushing and 3-8 pts.wt. inorganic binder is press-molded in a mold, dried in the mold and fired at 600-800 deg.C to obtain the sintered body useful as a material for civil engineering and construction and for apparatus industry through simple producing steps as a recycled prodgct of waste at a low cost. The inorganic binder is preferably water glass and the grain size of the granules is preferably 8-200 mesh. Glass bottles 1 classified according to color are crushed to obtain glass granules 3, the granules 3 are sieved and the sieved glass granules 5 are mixed with an inorganic binder 6. The mixture is filled into a mold 9 and press-molded with a press 10, the resultant molding 11 is dried by heating and the solidified molding 13 is fired in a firing furnace 14. The resultant sintered body has high strength and high gas permeability and can be used at 500-600 deg.C.
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