Ebulliometric Determination of the Infinite Dilution Activity Coefficient IDAC

1

Course CL-232
Porosity Measurement (Materials)
Faculty Prof. Jayesh Bellare TAs
Amit Patil Swathi
2
Objectives

• To determine Apparent porosity of refractory
  
• materials using The Boiling Water Method
• To determine True specific gravity of material

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Theory

• The Boiling Water method
• Apparent porosity Relation between the volume of
  a mass and the volume of the water absorbed when
  the mass is immersed.
• Open pore volume/ Bulk volume
• True Porosity The sum of open pores as
  determined by water absorptions plus the volume
  of those pores which are sealed by vitreous
  matter and therefore closed to water
• Total pore Volume/ Bulk volume

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Apparent Porosity
D (Dry weight of specimen )
S (Suspended weight )
W (Saturated Weight )
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Specific Gravity
W1 (weight of Pycnometer)
W2 (weight of Pycnometer Sample )
W4 (wt of Pycnometer Sample water )
W3 (wt of Pycnometer Samplekerosene)
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Role of porosity

• Thermal conductivity
• Permeability
• Surface properties
• Thermal resistance of the body
• Corrosion

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Sample Calculation

• Apparent porosity (P)
• Specific Gravity