| 摘要 |
PROBLEM TO BE SOLVED: To provide a laminated foam glass useful as a decorative heat- insulating material or the like for building or various kinds of industries by effectively utilizing a waste glass formed at the time of dismantlement of building and automobile, and including much impurities. SOLUTION: This laminated foam glass produced by using a broken or crushed product of a waste glass including impurities as a raw material has a laminated structure consisting of a back layer 2 composed of a dense glass layer or a foam glass layer containing no impurity or a slight amount of a fine impurity, an intermediate layer 3 composed of the foam glass layer containing the impurities 6 and 7, and a surface layer 4 composed of a dense glass layer containing no impurity or a small amount of fine impurity.
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