c) Determine the hydraulic conductivity ofthe sand in the field condition if thehydraulic conductivity of sand at the max.dry unit weight condition is 0.03 cm/sec.Using Kozeny-Carman equationK1 1+e1K2 e21+e2 6 Problem:The max. dry unit weight determined in thelaboratory for a quart sand is 102 lb/ft3. In thefield, the relative compaction is 90%. Specificgravity of sand is 2.70.a)Determine the void ratio at the max. dryunit weight condition.Determine the void ratio of the sand inb)the field condition.

Void ratio is defined as the ratio of the volume of voids to the volume of solids. The void ratio…

c) Determine the hydraulic conductivity of the sand in the field condition if the hydraulic conductivity of sand at the max. dry unit weight condition is 0.03 cm/sec. Using Kozeny-Carman equation K 1+e1 K2 e2 1+e2

c) Determine the hydraulic conductivity of the sand in the field condition if the hydraulic conductivity of sand at the max. dry unit weight condition is 0.03 cm/sec. Using Kozeny-Carman equation K 1+e1 K2 e2 1+e2

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter7: Permeability

Section: Chapter Questions

Problem 7.16P

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Concept explainers

Soil Compaction Test

Soil compaction is the major area of geotechnical engineering. Soil is composed of multiple pores present on its surface, while the soil is mainly composed of gravel, sand, rocks, etc. The arrangement of these rocks and gravels is such that they build up voids (spaces) between them, which allows spaces for the roots of the plants and crops to spread and absorb the required amount of nutrients. Soil compaction is a major problem primarily caused by human activities, micro-organisms, and other multiple factors.

Question

c) Determine the hydraulic conductivity of
the sand in the field condition if the
hydraulic conductivity of sand at the max.
dry unit weight condition is 0.03 cm/sec.
Using Kozeny-Carman equation
K1 1+e1
K2 e2
1+e2

6 Problem:
The max. dry unit weight determined in the
laboratory for a quart sand is 102 lb/ft3. In the
field, the relative compaction is 90%. Specific
gravity of sand is 2.70.
a)
Determine the void ratio at the max. dry
unit weight condition.
Determine the void ratio of the sand in
b)
the field condition.

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Step 2: Calculate the void ratio corresponding to the maximum dry unit weight:

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Step 3: Calculate the void ratio corresponding to the field condition:

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Step 4: Calculate the co-efficient of permeability at field condition:

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