Based on Allen Hazen experiments, permeability can be expressed as___________
In 1892 ,Allen Hazen based on his experiment on filter of sand particles between 0.1 and 3 mm ,found that the permeability can be expressed as K=CD102.
Which of the following factors affects the permeability of soil?
Grain size, properties of pore fluid, structural soil arrangement of soil particles, entrapped air and foreign matter and adsorbed water.
Physical permeability of a soil KP is related to coefficient of permeability by the equation___________
In 1937, Muskat pointed out a relationship between physical permeability and Darcy’s coefficient of permeability as KP=kɳ/γW.
Loudon’s experiments demonstrated the relationship between_____________
Loudon’s experiment demonstrated that, the permeability of coarse grained soils is inversely proportional to the specific surface at a given porosity.
What is the constant value of a and b in Loudon’s empirical formula “log10(KSs2) =a + bn”?
Based on his experiments, Loudon found out the value of a and b s 1.365 and 1.515 for permeability of 10°c.
What is the relationship between permeability and viscosity of water?
From Poiseuille’s law, K=Ds2 γw /ɳ
It is found that permeability is directly proportional to the unit weight of water and inversely proportional to its viscosity.
What is the effect of adsorbed water on permeability of soil?
The adsorbed water surrounding the fine soil particles is not free to move, and reduces the effective pore space available for the passage of water.
What is the approximate value, which can be taken as void ratio occupied by adsorbed water?
According to approximation value after casagrande, 0.1 may be taken as the void ratio occupied by adsorbed water.
The effect of structural disturbance is on permeability is more in_____________
The effect of structural disturbance on permeability is much pronounced in fine-grained soil than any other.
The structural arrangement of soil Particle vary depending upon______________
The structural arrangement of the particle may vary, at the same void ratio, depending upon the method of deposition or compacting the soil mass.