Porosity Measurement (Materials)

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Presentation transcript:

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

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

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.

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

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

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

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