Cement Fineness Testing Methods in the Laboratory
Explore the two methods for measuring cement fineness: dry sieving over a standard sieve and Blaine's air permeability method. Learn about the apparatus used and environmental conditions required for accurate testing.
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Presentation Transcript
Laboratory test of cement: - FINENESS OF CEMENT BY DRY SIEVING OVERVIEW Fineness of cement is measured by sieving it on standard sieve. The proportion of cement of which the grain sizes are larger than the specified mesh size is thus determined.
STANDARD SPECIFICATION HOME WORK ..
- FINENESS OF CEMENT BY BLAINES AIR PERMEABILITY METHOD OVERVIEW Blaine s air permeability apparatus consists essentially of a means of drawing a definite quantity of air through a prepared bed of cement of definite porosity. The fineness is expressed as a total surface area in square centimeters per gram.
APPARATUS Measuring instruments Name Range Balance 3 g Timer 30 min. 0.2 sec Accuracy 1 mg
ENVIRONMENTAL CONDITION Temperature Humidity 65 % (max.) 27 20 C
