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The ____________ is the most effective process of repairing concrete work which has been damaged due to enquiry work or other reasons.

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The ____________ is the most effective process of repairing concrete work which has been damaged due to enquiry work or other reasons.

(a) Grouting

(b) Guniting

(c) Vibrating

(d) Pouring

I had been asked this question during an interview for a job.

This key question is from Placing of Concrete topic in chapter Cement Concrete Construction of Construction & Building Materials

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Right option is (b) Guniting

Easy explanation: In Guniting method, the surface to be treated is cleaned and washed, the nozzle of gun is generally kept at a distance of about 750 mm to 850 mm from the surface to be treated and the velocity of nozzle varies from 120 m/sec to 160 m/sec.

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