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Frost heave is defined as ___________

(a) Rise of ground water surface

(b) Freezing of water in soil

(c) Increase in volume due to freezing

(d) None of the mentioned

This question was posed to me by my school principal while I was bunking the class.

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

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Correct answer is (a) Rise of ground water surface

The explanation: Rise of ground water surface in a soil mass due to frost action is termed as frost heave.

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