Abstract
This report, presented at the Fifth World Congress of the Federation Internationale de la Precontrainte (FIP), discusses all of the known properties of prestressed lightweight concrete made with high-quality structural lightweight aggregates such as expanded shales, clays and slates, and capable of developing cube strengths from 280 to 500 kg/cm2 (4000 to 7000 psi) at unit weights of 1400 to 2000 kg/m 3 (85 to 120 pcf). It describes fabrication with prestressed lightweight concrete, applications, performance in typical structures, and reviews possible areas for research. General ranges in all of the properties are shown in graphs in the appendix. Satisfactory values of shrinkage and creep are obtainable. Modulus of elasticity is approximately half that of normal concrete at the same strength. Fire resistance and thermal insulation are significantly better than for normal weight concrete. Specific applications are listed.
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