What is the modulus of elasticity of concrete is?
The modulus of elasticity of concrete is relatively constant at low stress levels but starts decreasing at higher stress levels as matrix cracking develops. The elastic modulus of the hardened paste may be in the order of 10-30 GPa and aggregates about 45 to 85 GPa.
How do you find the secant modulus of concrete?
Secant modulus can be determined between two points on the curve by drawing a straight line. One starts from origin and the second point will be any other point on the curve. Second point that mostly consider is almost 85% of compressive stress of concrete.
What does secant modulus of elasticity mean?
Secant modulus of elasticity is stress divided by strainat any given value of stress or strain. It also is called stress-strain ratio. The the definition, in practice, it’s the difference between instantaneous and average rate of change.
What is the GPa of concrete?
Concrete generally have an elastic modulus varying between 30 to 50 GPa.
What is EC for concrete?
Modulus of elasticity of concrete(Ec) is defined as the ratio of the applied stress to the corresponding strain. Not only does it demonstrate the ability of concrete to withstand deformation due to applied stress but also its stiffness. In other words, it reflects the ability of concrete to deflect elastically.
What is dynamic modulus of elasticity?
Dynamic modulus (sometimes complex modulus) is the ratio of stress to strain under vibratory conditions (calculated from data obtained from either free or forced vibration tests, in shear, compression, or elongation). It is a property of viscoelastic materials.
What is tangent and secant modulus?
The initial tangent modulus is the slope of the initial straight line portion of the stress-strain curve, while the secant modulus is the slope of the line from zero deviator stress to a de- viator stress equal to one-half or one-third of the peak deviator stress (Lambe and Whitman 1969).
What is secant modulus used for?
The secant modulus can be expressed as a percentage of the Young’s Modulus (e.g., 0.7E or 0.85E), and it is used to describe the stiffness of a material in the inelastic region of the stress-strain diagram. Secant modulus is commonly denoted by Es.
What is the modulus of elasticity of M 40 prestressed concrete?
14 – 41 GPa
Modulus of elasticity – E : 14 – 41 GPa (2 – 6 x 106 psi) Permeability : 1 x 10-10 cm/sec.
What is the SG of concrete?
Specific Gravity Table
| Material – powder, ore, solids, etc. | kg/cu.m |
|---|---|
| Coke | 570- 650 |
| Concrete, Asphalt | 2243 |
| Concrete, Gravel | 2403 |
| Concrete, Limestone with Portland | 2371 |
What is the modulus of elasticity of concrete in MPa?
IS:456 the modulus of elasticity of concrete is 5000√f’c, MPa.
How do you calculate dynamic modulus of elasticity?
Ed = kn2 L2P where, Ed – is the dynamic modulus of elasticity K – is constant N- is resonant frequency L- is length of specimen P – is the density of concrete. The value of dynamic modulus of elasticity can also be computed from UPV method as below.