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Even after the excess pore pressure due to consolidation is dissipated, change in void ratio continues and this phenomenon is known as _____________

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Even after the excess pore pressure due to consolidation is dissipated, change in void ratio continues and this phenomenon is known as _____________

(a) secondary consolidation

(b) pre-consolidation

(c) under- consolidation

(d) normal- consolidation

I had been asked this question in unit test.

This intriguing question originated from Secondary Consolidation and Three Dimensional Consolidation in section One Dimensional Consolidation of Geotechnical Engineering I

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The correct answer is (a) secondary consolidation

The best I can explain: The secondary consolidation occurs at a very slow rate. Even after the excess pore pressure due to consolidation is dissipated, change in void ratio continues and this phenomenon is known as secondary consolidation.

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