Flexural tests of prestressed cellular slabs (Slabs F-3 and F-4)

Abstract

Two additonal specially designed specimens were constructed and subjected to pure bending following the completion of the investigation in which twenty nine 5-by 5-ft prestressed cellular slabs tested under concentrated loads (see NBS Report 6321).One slab was made of reinforced blocks and the other was made of unreinforced blocks.Both slabs contained epoxy resin joints and were prestressed to 1000 psi in both directions. De-flections, strains, crack patterns, and maximum bending moments were recorded.Since the cellular portions of the slabs were not subjected to shear, both slabs developed flexural failures as the top flanges of the blocks failed in compression.