CTQP Asphalt Paving Inspection 5

Question 1

What is 'raveling' in an asphalt pavement surface?

Accepted Answer

Progressive loss of aggregate particles from the pavement surface

Answer

Raveling is the progressive disintegration of the asphalt surface caused by loss of bond between aggregate particles and the binder.

Question 2

The Performance Grade (PG) binder specification system is based primarily on:

Accepted Answer

Pavement expected service temperature range and traffic loading

Answer

The PG system selects binder based on the high and low pavement design temperatures and traffic loading conditions at the project location.

Question 3

What action should an inspector take if asphalt mix arrives at the paver with visible segregation in the truck?

Accepted Answer

Reject the load and document the rejection

Answer

Segregated loads should be rejected because they result in non-uniform mix placement that cannot be corrected by rolling.

Question 4

During hot weather paving, what problem is most likely to occur with the asphalt mix?

Accepted Answer

Compaction window is reduced due to faster cooling of the mat

Answer

Although hot ambient temperatures slow cooling, very high pavement temperatures in combination with thin lifts can still narrow the compaction window unpredictably.

Question 5

What is the purpose of the breakdown roller in the asphalt compaction sequence?

Accepted Answer

To provide the initial primary compaction immediately behind the paver

Answer

The breakdown (or primary) roller follows closely behind the paver to achieve the initial densification of the hot mat while it is still workable.

CTQP - Construction Training & Qualification Program Practice Test

CTQP - Construction Training & Qualification Program Practice Test

CTQP Asphalt Paving Inspection 5