Concrete Strength Variation in Actual Structures

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Title: Concrete Strength Variation in Actual Structures

Author(s): W. K. Tso and I. M. Zelman

Publication: Journal Proceedings

Volume: 67

Issue: 12

Appears on pages(s): 981-988

Keywords: coefficient of variation; columns (supports) ; compressive strength; concretes; probability theory; reinforced concrete; reliability; statistical analysis; tolerances (mechanics) ; ultrasonic tests.

Date: 12/1/1970

Abstract:
Field testing of 403 concrete columns in 10 buildings was made to study the concrete strength variation of columns in actual structures. The ultrasonic testing method was used. Means and standard deviations of the data were computed on a per building basis. An additional 12 columns were cast in the laboratory and tested both for pulse velocity variation and concrete strength variation. The concrete strength variation of the field tested columns was then inferred from the results of the laboratory tested specimens.