E-modulus (modulus of elasticity) testing of concrete is a method for determining the stiffness of concrete - and is a measure of how much it deforms under load. E-modulus testing is important for understanding the mechanical properties of concrete and for ensuring that it meets the requirements of specific structures.
Concrete specimens, usually cylindrical, are cast and cured under controlled conditions.
The specimen is placed in a testing machine that can apply a controlled load. A compressometer or similar device is used to measure the deformation of the specimen.
Load application is done by applying a series of compressive loads, usually up to about 40% of its compressive strength. The load is gradually increased while the deformation is measured.
The deformation is recorded at each load step, and a stress-strain curve is generated.
Calculation of E-modulus: The E-modulus is calculated as the slope of the linear portion of the stress-strain curve. This provides a measure of the elastic response of the concrete to load.
E-modulus /FTS pressure
E-modulus equipment must mainly be factory-mounted on concrete presses.
NS-EN 12390-13 – E-modulus. Determination of secant modulus of elasticity under compression
ASTM C469
