The present status of structural light-weight concrete in the U.S.A.
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"The principal disadvantage of concrete as a structural material is its relative great dead weight. This paper traces the development of commercially produced lightweight aggregates in the U.S.A. The manufacture and the characteristics of such aggregates and of the concrete made with them is discussed. The influence of the properties of these materials on design are briefly considered, as are the factors which govern the economic use of structural lightweight concrete."--Page 1.