CCIL CCIL - Canadian Council of Independent Laboratories Pavement Construction and Inspection Questions and Answers 2

Question 1

What is the primary purpose of tack coat applied between asphalt pavement layers?

Accepted Answer

To bond successive asphalt lifts together to prevent slippage

Answer

To waterproof the surface before placing the next lift

Answer

To reduce segregation at the screed of the paving machine

Answer

To cool the underlying lift before the overlay is placed

Question 2

What AASHTO standard test method governs measuring ride quality of pavement using a profilograph or inertial profiler?

Accepted Answer

AASHTO R 57 / ASTM E950

Answer

AASHTO T 246

Answer

AASHTO T 168

Answer

AASHTO M 320

Question 3

What is the purpose of conducting a field core extraction from a compacted asphalt pavement after placement?

Accepted Answer

To verify in-place density, thickness, and extract samples for air void and VMA determination

Answer

To measure the pavement temperature gradient through the lift thickness

Answer

To obtain specimens for resilient modulus testing in the field

Answer

To confirm aggregate gradation after compaction has altered particle sizes

Question 4

During granular base compaction inspection, what test is commonly used to verify in-place density of crushed stone base materials?

Accepted Answer

Sand cone test (ASTM D1556)

Answer

Standard Proctor test (ASTM D698)

Answer

Plate load test (ASTM D1194)

Answer

Unconfined compression test (ASTM D2166)

Question 5

What does the term 'mat temperature uniformity' refer to during asphalt paving inspection?

Accepted Answer

Consistent surface temperature across the full width of the freshly placed mat behind the paver screed

Answer

Uniform temperature of the asphalt mix in the truck prior to discharge

Answer

Equal temperature at the top and bottom of the compacted asphalt lift

Answer

Thermal consistency of the pavement during the curing period

Question 6

What is the primary indicator of rutting susceptibility in a dense-graded hot mix asphalt mix design?

Accepted Answer

High binder content with insufficient VMA relative to aggregate structure

Answer

Low aggregate angularity and flat elongated particle content

Answer

Excessive fines passing the No. 200 sieve above specification limits

Answer

Low compaction temperature causing inadequate density during rolling