Modulus of Elasticity of Rock
Modulus of elasticity of rocks depend upon several factors, such as,
- Type of rock
- Porosity
- Grain size
- Water content
Value of modulus of elasticity can be determined by static or dynamic methods. Higher value of modulus of elasticity indicates good quality rock having sound composition. Typical values of modulus of elasticity of some common are given in the table below.
Modulus of Elasticity of Some Common Rocks
| Types of Rocks | Name of Rocks | Youngs Modulus of Elasticity (E), kg/cm2*105 |
| Igneous Rocks | Basalt | 2.0 – 10.0 |
| Diabase | 3.0 – 9.0 | |
| Gabbro | 6.0 – 11.0 | |
| Granite | 2.6 – 7.0 | |
| Syemite | 6.0 – 8.0 | |
| Sedimentary Rocks | Dolomite | 2.0 – 4.4 |
| Limestone | 1.0 – 8.0 | |
| Sandstone | 0.5 – 8.6 | |
| Shale | 0.8 – 3.0 | |
| Metamorphic Rocks | Gneiss | 2.0 – 6.0 |
| Marble | 6.0 – 9.0 | |
| Quartzite | 2.6 – 10.2 | |
| Schist | 4.1 – 7.2 |
Poisson’s Ratio of Rock
Poisson’s ratio measures the ratio of lateral strain to axial strain at linearly elastic region. For most rocks, the value of Poisson’s ratio ranges in between 0.15 to 0.40. Typical values of modulus of elasticity of some common are given in the table below.
Values of Poisson’s Ratio for Some Common Rocks
| Types of Rocks | Name of Rocks | Average Values of Poisson’s Ratio (ν) |
|
Igneous Rocks |
Basalt | 0.14 – 0.20 |
| Diabase | 0.125 – 0.25 | |
| Gabbro | 0.125 – 0.25 | |
| Granite | 0.125 – 0.25 | |
| Syemite | 0.25 | |
| Sedimentary Rocks | Dolomite | 0.08 – 0.20 |
| Limestone | 0.10 – 0.20 | |
| Sandstone | 0.066 – 0.125 | |
| Shale | 0.11 – 0.54 | |
| Metamorphic Rocks | Gneiss | 0.091 – 0.25 |
| Marble | 0.25 – 0.38 | |
| Quartzite | 0.23 | |
| Schist | 0.01 – 0.20 |
Kindly provide the reference of above values.
What is the practical implementation of poison’s ratio of rocks in foundation design
Hello sir, will you please help me to determine modulus of elasticity of rock
Could you post the reference link
First of all, (kg/cm^2)*10^5 is not the correct unit for Young’s modulus, which should be in units of pressure. Pressure is a force over an area, so N*m^-2 or in SI units kg*m^-1*s^-2. Maybe what you were going for was gigapascals, which would be (N/cm^2)*10^5, although a better way to write that would just be (N/m^2)*10^9. Second, if you’re going with GPa, all of these values of Young’s modulus are off by an order of magnitude. These should be 10x larger if you are talking about GPa.
-Austin
Or he’s using kgf/cm^2, in which case the values make perfect sense and look about spot on…
I usually find it pays to try and read things in as much good faith as possible ?
Plz ans me what is the value of poisson’s ratio for a liquid?
Hey Suryakanta,
Could you please provided the reference where you found the information regarding Basalt’s Poisson’s Ratio ?
Thank you
Marc