A bed of uniform sand having particle size 0.6 mm and specific gravity as 2.68 has porosity 0.42. Depth of the bed is 70 cm which is to be washed hydraulically. What is the backwashing rate if expansion of the bed is 40%. (Assume Stoke's law is valid and v = 1.3 x 10-2 cm?/sec)

A bed of uniform sand having particle size 0.6 mm and specific gravity as 2.68 has porosity 0.42. Depth of the bed is 70 cm which is to be washed hydraulically. What is the backwashing rate if expansion of the bed is 40%. (Assume Stoke's law is valid and v = 1.3 x 10-2 cm?/sec)

Principles of Foundation Engineering (MindTap Course List)

8th Edition

ISBN:9781305081550

Author:Braja M. Das

Publisher:Braja M. Das

Chapter2: Geotechnical Properties Of Soil

Section: Chapter Questions

Problem 2.11P

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Question

A bed of uniform sand having particle size 0.6 mm and specific gravity as 2.68 has porosity
0.42. Depth of the bed is 70 cm which is to be washed hydraulically. What is the
backwashing rate if expansion of the bed is 40%. (Assume Stoke's law is valid and v = 1.3 x
10-2 cm?/sec)

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