Explain determination of bulking of fine aggregate with neat sketch.

Explain determination of bulking of fine aggregate with neat sketch.
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Determination of bulking of fine aggregate (sand): 1. Take 100 gm. of given sand sample and fill it in measuring cylinder about one-third of its weight. Take this volume of sand V1 ml. 2. Now add 2% water by weight in sand initially. Shake the cylinder vigoursly using palm at top and bottom to cylinder. Note down the increased volume of sand V2 ml. 3. Calculate % bulking of sand as b1 = ((V2- V1)/ V1] x 100 4. Repeat above steps by adding water at suitable intervals (say 2%) i.e. 4%, 6%, 8% etc. and observe increased volumes V3, V4, V5 etc. Also calculate corresponding % bulking as b2, b3, b4% using above formula. 5. Finally draw the bulking curve as % water versus % bulking as shown in fig below. Note down the maximum % of bulking and corresponding optimum % of water from it.

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