Civil Engineering - Soil Mechanics and Foundation Engineering - Discussion
Discussion Forum : Soil Mechanics and Foundation Engineering - Section 1 (Q.No. 5)
5.
Which one of the following statements is true ?
Discussion:
58 comments Page 2 of 6.
Indhu said:
8 years ago
As the size of the particle decreases, porosity will increases. Hence on comparing the clay and sand particle, clay is having greater porosity. Even though the porosity of clay is higher, it doesn't mean that its permeability is more than sand. Since only interconnected pores will allow the passage of fluid.
Shehzad said:
1 decade ago
Let us talk in terms of bulk density. Bulk density of clay's is less than that of sands. If we compare the masses of both clay and sand particles in two containers of equal volume, then there will be larger volume of voids inside the container of clay's which shows higher porosity of clay than sands.
Shianrilong Reamei said:
5 years ago
Regarding porosity:
Number of pores in fine-grain soil>>> Number of pores in CGS. Therefore porosity is high.
Imagine the number of FGS particles present in 1kg soil v/s number of cgs particles present in 1kg soil. Fgs outnumber the cgs zillion times.
Number of pores in fine-grain soil>>> Number of pores in CGS. Therefore porosity is high.
Imagine the number of FGS particles present in 1kg soil v/s number of cgs particles present in 1kg soil. Fgs outnumber the cgs zillion times.
Souryakanti rana said:
5 years ago
Clay particles are small in size, and pore water pressure is large, on the other hand for sand pore space is large but small in number for the same volume as clay and poor water pressure low. That's why the quick range of gravitational water (permeability).
Engir said:
8 years ago
Clays: Porous but impermeable (i. E they store water but not yield them back, because of tight molecular structure) as Aquicludes.
While Sand: yield sufficiently and are highly permeable (because of large grain size) but not as porous than clay.
While Sand: yield sufficiently and are highly permeable (because of large grain size) but not as porous than clay.
Vicky said:
10 years ago
D correct.
Porosity - % age of availability of pores.
Permeability - % age of water flow through it.
In sand - Pores % age are less, so we are not compacted.
In soil - Pores % age are more, so we are compacted mechanical mean.
Simple.
Porosity - % age of availability of pores.
Permeability - % age of water flow through it.
In sand - Pores % age are less, so we are not compacted.
In soil - Pores % age are more, so we are compacted mechanical mean.
Simple.
Dhan Bahadur K.C. said:
5 years ago
Simply;
Porosity = Volume of the Void/Total volume of the soil mass, It indicates that the quantity of void in soil contain in which the void remains in the soil. The void are contained more than the sand. So D is the correct answer.
Porosity = Volume of the Void/Total volume of the soil mass, It indicates that the quantity of void in soil contain in which the void remains in the soil. The void are contained more than the sand. So D is the correct answer.
Nitin said:
1 year ago
In clay, the particle size is small as compared to sand. So the perimeter of clay particles is more than sand as the same volume of clay and sand. So, I think the clay is more porous than sand but less permeable than sand.
(2)
Om prakash said:
8 years ago
Porosity and permeability are directly proportional and its fact that porocity of clay is more then that of sand but in case of clay, particle are electrically charged and due to charged partical waters are hold by clay.
Abinet said:
6 years ago
Clay soils are more porous than sandy soils. True because porosity is the ability of a material to hold water where as permeabilty is the ability of a material to allow passage of water through it.
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