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2 cards from this section. Quick, good the night before a test.
What is penetration grade?
Think about needle tests and penetration.
Name one example of a viscosity grade.
Remember the 'VG' prefix.
What does a higher penetration grade indicate?
Remember the needle penetration test.
True or False: Viscosity grades categorize bitumen by its softness.
Link viscosity to fluidity.
Consider a project in a region with high temperatures. The team initially selected VG-10 for the pavement and faced issues with deformation. Discuss the impact of choosing a lower viscosity grade.
Analyze the heat effects on material properties.
A city is experiencing fluctuating weather patterns with extreme variations. What grading would you recommend for new road construction? Justify your choice.
Balance between soft and hard grades for temperature changes.
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