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According to ISI bitumen is classified into

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According to ISI, bitumen is classified into

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Correct Answer: Option D
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Riju Chakraborty
Riju Chakraborty 4 months ago
According to the old ISI (IS:73) penetration grading system, bitumen is classified into 6 grades:

1. S-35 (30/40 penetration)
2. S-45 (40/50 penetration)
3. S-55 (50/60 penetration)
4. S-65 (60/70 penetration)
5. S-90 (80/100 penetration)
6. S-200 (180/200 penetration)
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