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Aggregates to be used for wearing course, the impact value shouldn’t exceed __________ percent.

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in Concrete Technology by (122k points)
Aggregates to be used for wearing course, the impact value shouldn’t exceed __________ percent.

(a) 30

(b) 35

(c) 40

(d) 25

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

My question is based upon Mechanical Properties of Aggregates topic in division Aggregates and Testing of Aggregates of Concrete Technology

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Best answer
Correct option is (a) 30

The best I can explain: Aggregates to be used for wearing course, the impact value shouldn’t exceed 30 %. For bituminous macadam the maximum permissible value is 35 %.

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