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Course: CL-232

Course: CL-232. Porosity Measurement (Materials). Faculty: Prof. Jayesh Bellare TA’s :Amit Patil Swathi. Objectives. To determine Apparent porosity of refractory materials using ”The Boiling Water Method” To determine True specific gravity of material.

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Course: CL-232

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  1. Course: CL-232 Porosity Measurement (Materials) Faculty: Prof. Jayesh Bellare TA’s :Amit Patil Swathi

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

  3. 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 Total bulk volume = Open pore volume + Closed pore volume+ Volume of material.

  4. Apparent Porosity D (Dry weight of specimen ) S (Suspended weight ) W (Saturated Weight )

  5. Specific Gravity W1 (weight of Pycnometer) W2 (weight of Pycnometer+ Sample ) W4 (wt of Pycnometer+ Sample+ water ) W3 (wt of Pycnometer+ Sample+kerosene)

  6. Role of porosity Thermal conductivity Permeability Surface properties Thermal resistance of the body Corrosion

  7. Sample Calculation Apparent porosity (P)% = Specific Gravity =

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