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Which of the following represents hardest grade of bitumen

This question belongs to Civil Engineering Highway Engineering
Highway Engineering
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Which of the following represents hardest grade of bitumen?

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Correct Answer: Option A
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2 Comments
Sahil Manhotra
Sahil Manhotra 7 years ago
Because the penetration of 30/40 bitumen is 3-4mm which is least, hence it is hardest as compared to other options.
Pijush Mahata
Pijush Mahata 7 years ago
Explain please
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