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A compressometer is a device used to determine the strain or deformation of a specimen while measuring the
A compressometer is a device used to determine the strain or deformation of a specimen while measuring the compressive strength
In mechanics, compressive strength or compression strength is the capacity of a material or structure to withstand loads tending to reduce size (as opposed to tensile strength which withstands loads tending to elongate). In other words, compre ...
of concrete specimens, generally a cylinder. It can be used for rock, concrete, soils,
and other materials. For concrete, the device usually comprises two steel rings for clamping to the specimen and two gauge length bars attached to the ring. When the compressive load is applied, the strain value is registered from the compressometer. Generally, a data logger
A data logger (also datalogger or data recorder) is an electronic device that records data over time or about location either with a built-in instrument or sensor or via external instruments and sensors. Increasingly, but not entirely, they a ...
is used to record the strain.
The stress strain curve is then used to determine the static Young's modulus
Young's modulus E, the Young modulus, or the modulus of elasticity in tension or compression (i.e., negative tension), is a mechanical property that measures the tensile or compressive stiffness of a solid material when the force is applied leng ...
of elasticity and Poisson's ratio
In materials science and solid mechanics, Poisson's ratio \nu ( nu) is a measure of the Poisson effect, the deformation (expansion or contraction) of a material in directions perpendicular to the specific direction of loading. The value of Pois ...
of concrete. ASTM C469 describes about the instrument.
See also
*Extensometer
An extensometer is a device that is used to measure changes in the length of an object. It is useful for stress-strain measurements and tensile tests. Its name comes from "extension-meter". It was invented by Charles Huston who described it ...
* Strain gauge
A strain gauge (also spelled strain gage) is a device used to measure strain on an object. Invented by Edward E. Simmons and Arthur C. Ruge in 1938, the most common type of strain gauge consists of an insulating flexible backing which supports ...
References
*ASTM International
ASTM International, formerly known as American Society for Testing and Materials, is an international standards organization that develops and publishes voluntary consensus technical standards for a wide range of materials, products, systems, an ...
C469 Standard Test Method for Static Modulus of Elasticity and Poisson's Ratio of Concrete in Compression
Materials testing
Test equipment
Measuring instruments
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