18 Questions
What is the recommended tool to remove aggregate from the surfacing when assessing the binder condition?
A screwdriver
What is the relationship between temperature and the brittleness of the binder?
Lower temperatures make the binder more brittle.
What is the visual indication of a 'lively' binder?
Bright black color
According to Table B.9, what is the description of a binder that is degree 3?
Binder appears dull (brownish), binder is brittle owing to hardening and/or aggregates can be dislodged from seal with relatively little effort.
What additional clue can the inspection of the shrinkage crack pattern provide about the dryness of the binder?
It can provide another indication of the dryness of the binder.
Why is it important not to rely solely on the visual assessment of the road surface when evaluating the binder condition?
The color of the aggregate can be misleading.
Which of the following statements accurately describes the influence of temperature on bleeding?
Surface tackiness and visible wheel prints in the binder are indicators of bleeding during hot weather.
Which of the following statements is true regarding the assessment of binder condition in asphalt pavements?
The extent should be rated as '5' unless the binder condition is rated as '0' or there are significant variations along the segment.
Which of the following statements accurately describes the characteristics of a severely bleeding asphalt surface?
The surface has a wet look, with a film of excess binder covering all stones in the wheel paths.
Which of the following surface treatments is most likely to exhibit bleeding?
Conventional dense-graded asphalt concrete
Which of the following defects is directly associated with bleeding in asphalt pavements?
Reduced surface texture depth
Which of the following statements accurately describes the behavior of bituminous binders in asphalt pavements?
Bituminous binders become less viscous and more fluid as temperature increases.
What is the primary reason for binder films in surface treatments becoming dry and brittle over time?
Loss of lighter, more volatile oils and aromatics, followed by oxidation
How does the oxidation process in surface treatment binder films progress over time?
The oxidized products dissolve in water and expose fresh surfaces after each rainfall, allowing oxidation to penetrate deeper
Why is the loss of oils and oxidation in asphalt binders more restricted compared to surface treatments?
The binder film in asphalts is thinner, and the low voids in the mix restrict access to air
What is the primary indication that aggregate loss from a surface treatment is active and ongoing?
General loss of stone from all layers in large areas
How should aggregate loss be rated if there is uncertainty about its activity?
Rate it as active to be conservative
What is the primary reason for assessing the binder condition (dry/brittle) in flexible pavements?
To assess the potential for raveling and aggregate loss
Test your knowledge on the visual assessment manual for flexible pavements as outlined in TMH9. Learn about rating degrees of binder condition, secondary defects like dry binder condition, shrinkage cracks, and aggregate loss. Explore topics such as bleeding, flushing, and more.
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