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__________ method is used to restore slab or pavement which has settled.

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__________ method is used to restore slab or pavement which has settled.

(a) Vibroflotation

(b) Freezing

(c) Chemical consolidation

(d) Cement grouting

I have been asked this question in an interview for job.

My doubt stems from Underpinning and its Types in section Scaffolding, Shoring and Underpinning of Construction & Building Materials

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Correct choice is (d) Cement grouting

Easy explanation: The operation of Cement grouting is simple. The holes are drilled in a slab and then cement grout is forced under pressure through these holes. The pressure is maintained until the cement grout has set.

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