Shear Strength of Lightweight Aggregate Reinforced Concrete Flat Plates


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Title: Shear Strength of Lightweight Aggregate Reinforced Concrete Flat Plates

Author(s): R. D. Mowrer and M. D. Vanderbilt

Publication: Journal Proceedings

Volume: 64

Issue: 11

Appears on pages(s): 722-729

Keywords: expanded shale aggregates;flat plates (concrete);lightweight aggregate concretes;lightweight aggregates;reinforced concrete;research;shear strength; slabs;specimens;testing

Date: 11/1/1967

Test results of 51 reinforced concrete specimens assumed to represent the portion of a flat plate bounded by a line of contraflexure around an interior column are reported. Forty-three of the slabs were constructed using an expanded shale aggregate and eight contained normal weight sand and gravel aggregate. Nine of the lightweight slabs were loaded to failure with two or four edges clamped and the other slabs were tested with all edges simply supported. The analyses showed that none of the empirical shear strength equations in existence served consistently to predict the strengths of the current test specimens. A new type of test specimen which closely simulates the portion of an interior panel around a column is described. Tests of this type of specimen should lead to a more precise definition of the shear strength of flat plates.