Development of a Device for the Direct Measurement of Compressive Stress

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Title: Development of a Device for the Direct Measurement of Compressive Stress

Author(s): Roy W. Carlson and David Pirtz

Publication: Journal Proceedings

Volume: 49

Issue: 11

Appears on pages(s): 201-215

Keywords: no keywords

Date: 11/1/1952

Abstract:
Describes the development, analysis, and testing of a device called a "stress meter" which measures compressive stress in concrete more or less directly. It shows that it is possible to make an embedded device which at all times regiusters very nearly the same stress as the surrounding concrete, regardless of the deformations, and it reports tests wherein stress meters embedded in a concrete specimen were shown to be practically intensive to creep under sustained load and to maintain the same zero-stress reading when the specimen was subjected to a variety of conditions. The stress meters also indicate very nearly the correct stress when loaded at various ages, although the modulus of elasticity of the concrete changes markedly.