# Properties of Porous Solids

Calculate True Specific Gravity

G_t=[W_2-W_1]/[(W_3-W_1)-(W_4-W_2)]
Gt = True Specific Gravity
W1 = Weight of S.G Bottle
W2 = Weight of S.G Bottle + Powdered Sample
W3 = Weight of S.G Bottle + Water
W4 = Weight of S.G Bottle + Water + Powdered Sample

Weight (W1):
Weight (W2):
Weight (W3):
Weight (W4):

Result:

True Specific Gravity (Gt):

Calculate Bulk Specific Gravity

G_b=[W×D]/[S-I]
Gb = Bulk Specific Gravity
W = Weight of Dry Piece in Fluid
D = Density Of Fluid
S = Weight of Dry Piece Soaked in Fluid
I = Weight of Dry Piece Soaked & Immersed in Fluid

Weight Of Dry Piece (W):
Fluid Density (D):
Weight Of Piece Soaked (S):
Weight Of Piece Soaked & Immersed (I):

Result:

Bulk Specific Gravity (Gb):

Calculate Apparent Solid Specific Gravity

G_a=[W×D]/[W-I]
Ga = Apparent Solid Specific Gravity
W = Weight of Dry Piece in Fluid
D = Density Of Fluid
I = Weight of Dry Piece Soaked & Immersed in Fluid

Weight Of Dry Piece (W):
Fluid Density (D):
WeightWeight Of Piece Soaked & Immersed (I):

Result:

Apparent Solid Specific Gravity (Ga):

Calculate Apparent Porosity

Apparent Porosity=[S-W]/[S-I]×100%
S = Weight of Dry Piece Soaked in Fluid
W = Weight of Dry Piece in Fluid
I = Weight of Dry Piece Soaked & Immersed in Fluid

Weight Of Piece Soaked (S):
Weight Of Dry Piece (W):
Weight Of Piece Soaked & Immersed (I):

Result:

Apparent Porosity:

Calculate Water Absorption

Water Absorption=[S-W]/W×100%
S = Weight of Dry Piece Soaked in Fluid
W = Weight of Dry Piece in Fluid

Weight Of Piece Soaked (S):
Weight Of Dry Piece (W):

Result:

Water Absorption:

Calculate True Porosity

True Porosity=(1-G_a/G_t)×100%
Ga = Apparent Solid Specific Gravity
Gt = True Specific Gravity