What is ASTM C469?
ASTM C469 is a compression test whereby a load is applied with a Constant-Rate of-Traverse (CRT) type machine until a specified stress. The modulus of elasticity and Poisson’s ration values will be found within the working stress range (0 to 40% of the ultimate strength).
What is a compressometer used for?
A compressometer is a device used to determine the strain or deformation of a specimen while measuring the compressive strength of concrete specimens, generally a cylinder. It can be used for rock, concrete, soils, and other materials.
What is Young’s modulus of concrete?
between 30 to 50 GPa
The elastic modulus of hardened cement paste is around 10 to 30 GPa and that of aggregate is between 45 to 85 GPa. Concrete generally have an elastic modulus varying between 30 to 50 GPa.
What is concrete permeability test?
Water permeability test determines the resistance of concrete against water under hydrostatic pressure. This permeability test should be considered the dominant test to evaluate the case whereby concrete is subjected to hydrostatic pressure.
What is Poisson’s ratio for concrete?
0.1 to 0.2
Ans: The Poisson’s ratio of concrete is 0.1 to 0.2.
What is Compressometer extensometer?
Compressometer/Extensometers are similar to the Compressometer in that they measure average deformation and strain of concrete cylinders during compression testing for determination of modulus of elasticity. This allows a combined determination of the modulus of elasticity and Poisson’s ratio.
What is Youngs modulus used for?
The Young’s modulus of a material is a useful property to know in order to predict the behaviour of the material when subjected to a force. This is important for almost everything around us, from buildings, to bridges to vehicles and more.
What is creep of concrete?
Concrete creep is defined as: deformation of structure under sustained load. Basically as long term pressure or stress on concrete can make it change shape. This deformation usually occurs in the direction the force is being applied. Like a concrete column getting more compressed, or a beam bending.
What are the 3 modulus of elasticity?
Elastic Moduli can be of three types, Young’s modulus, Shear modulus, and Bulk modulus.
What do you mean by modulus of elasticity?
Definition of modulus of elasticity : the ratio of the stress in a body to the corresponding strain (as in bulk modulus, shear modulus, and Young’s modulus) — called also coefficient of elasticity, elastic modulus.
How is permeability measured?
Permeability is measured on cores in the laboratory by flowing a fluid of known viscosity through a core sample of known dimensions at a set rate, and measuring the pressure drop across the core, or by setting the fluid to flow at a set pressure difference, and measuring the flow rate produced.
What does c469 stand for?
ASTM C469 / C469M-14e1, Standard Test Method for Static Modulus of Elasticity and Poisson’s Ratio of Concrete in Compression, ASTM International, West Conshohocken, PA, 2014, www.astm.org
What is astastm c469?
ASTM C469 is a compression test whereby a load is applied with a Constant-Rate of-Traverse (CRT) type machine until a specified stress. The modulus of elasticity and Poisson’s ration values will be found within the working stress range (0 to 40% of the ultimate strength).
What is the ASTM c469 test for hardened concrete?
An error occurred while retrieving sharing information. Please try again later. ASTM C469 testing provides a stress to strain ratio value and a ratio of lateral to longitudinal strain for hardened cylindrical concrete at whatever age and curing conditions may be designated.