This is about Bulking of fine aggregates

1. BULKING OF SAND
J SAI PRASANNA KUMAR
16031A0119
CIVIL ENGINEERING
UCEN JNTUK NARASARAOPET

2. Bulking of sand:
• Increase in volume of the sand due to the
moisture content is known as “BULKING OF
SAND”.
Reason:
• It is due to the formation of water films
around sand particles.
• But beyond 8-10% the film starts breaking and
the volume starts reducing.

4. From the graph:
• Increase in volume is 20-40%
• Maximum bulking takes place at 6-10%
• Finer the sand more the bulking
• When moisture content is >20% volume of
sand is as that of dry sand.

6. Experiment :
• Fill 2/3rd of container with sand.
• Height is measured say it is 200mm
• Sand is taken out.
• Container is filled with water
• Sand is slowly dropped in container and stirred.
• Height is measured say it is 160mm.
• Bulking of sand = (200-160)/160 = 25%

7. THANK YOU