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Bitumen grade 80/100 indicates that under the standard test conditions, penetration value of bitumen would vary from
  • a)
    0.8 mm to 1 mm
  • b)
    8 mm to 10 mm
  • c)
    8 cm to 10 cm
  • d)
    0.08 mm to 0.1 mm
Correct answer is option 'B'. Can you explain this answer?
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Bitumen grade 80/100 indicates that under the standard test conditions...
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Bitumen grade 80/100 indicates that under the standard test conditions...
Bitumen grade 80/100 represents range from 80cm to 100cm which converted to mm gives 8mm to 10mm
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Bitumen grade 80/100 indicates that under the standard test conditions...
Explanation:
The grade of bitumen refers to its consistency and stiffness. In the case of bitumen grade 80/100, it indicates that the bitumen has a penetration value within a specific range under standard test conditions.

Penetration Test:
The penetration test is used to measure the hardness or softness of bitumen. It involves measuring the depth in tenths of a millimeter to which a standard needle penetrates the bitumen sample under specified conditions of time, temperature, and applied force.

Bitumen Grade 80/100:
In the case of bitumen grade 80/100, the penetration value of the bitumen would vary from 8 mm to 10 mm. This means that when the standard needle is applied to the bitumen sample, it would penetrate to a depth between 8 mm and 10 mm.

Understanding the Options:
Now let's understand why the correct answer is option 'B' - 8 mm to 10 mm.

a) 0.8 mm to 1 mm: This range is too low for bitumen grade 80/100. It would indicate a much harder and stiffer bitumen grade.
c) 8 cm to 10 cm: This range is too high for bitumen grade 80/100. It would indicate a very soft and less stiff bitumen grade.
d) 0.08 mm to 0.1 mm: This range is also too low for bitumen grade 80/100. It would indicate a much harder and stiffer bitumen grade.

Conclusion:
Hence, the correct answer is option 'B' - 8 mm to 10 mm, as it represents the range of penetration values for bitumen grade 80/100 under standard test conditions.
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