Table of Contents

modulus of elasticity of rock

The modulus of elasticity of rocks depends on many factors, such as,

rock type
porosity
grain size
amount of water

The value of modulus of elasticity can be determined by static or dynamic methods. Higher value of modulus of elasticity indicates good quality rock with sound structure. Typical values of modulus of elasticity of some normal are given in the table below.

modulus of elasticity of some common rocks

types of rocks	name of rocks	*Young’s modulus of elasticity (E), kg/cm²10⁵**
igneous rocks	bajalat	2.0 – 10.0
	quarry	3.0 – 9.0
	black Stone	6.0 – 11.0
	granite	2.6 – 7.0
	cymite	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	shell	2.0 – 6.0
	marble	6.0 – 9.0
	quartzite	2.6 – 10.2
	shale	4.1 – 7.2

Poisson’s ratio of rocks

Poisson’s ratio linearly measures the ratio of the axial strain to the lateral stress in the elastic field. For most rocks, the Poisson’s ratio ranges from 0.15 to 0.40. Typical values of modulus of elasticity of some normal are given in the table below.

Poisson’s ratio value for some common rocks

types of rocks	name of rocks	Average value of Poisson’s ratio (,
igneous rocks	bajalat	0.14 – 0.20
	quarry	0.125 – 0.25
	black Stone	0.125 – 0.25
	granite	0.125 – 0.25
	cymite	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	shell	0.091 – 0.25
	marble	0.25 – 0.38
	quartzite	0.23
	shale	0.01 – 0.20