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What is the maximum capillary tension for a tube of 0.05 mm diameter at 4°c?

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in Geotechnical Engineering I by (102k points)
What is the maximum capillary tension for a tube of 0.05 mm diameter at 4°c?

(a) 6.05 KN/m^3

(b) 0.617 KN/m^3

(c) 5.45 KN/m^3

(d) 3.00 KN/m^3

This question was posed to me in an international level competition.

This key question is from Frost Action topic in portion Soil Water Effective and Neutral Stresses of Geotechnical Engineering I

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Best answer
The correct choice is (a) 6.05 KN/m^3

The explanation is: Maximum capillary height at 4°c is

(hC) max = 0.3084/d =0.617 m

Capillary tension = (hc) max × γmax

=6.05 KN/m^3.

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