CCIL - Canadian Council of Independent Laboratories Asphalt Mix Compliance Testing Questions and Answers

Question 1

According to CCIL procedures for Asphalt Mix Compliance (Type B Certification), which of the following is a primary reason for determining the bulk specific gravity (Gmb) of a compacted asphalt specimen?

Accepted Answer

To calculate the percent air voids and degree of compaction.

Answer

To determine the stripping potential of the aggregate.

Answer

To verify the angularity and texture of the coarse aggregate.

Answer

To measure the asphalt binder's viscosity at a standard temperature.

Question 2

A technician is performing a Marshall Stability and Flow test (ASTM D6927) for a municipal road project. The flow value represents which characteristic of the asphalt mix?

Accepted Answer

The plastic deformation of the specimen at the point of maximum load.

Answer

The total time until the specimen fails under load.

Answer

The maximum load the specimen can withstand before failure.

Answer

The temperature at which the asphalt binder becomes fluid.

Question 3

During the determination of theoretical maximum specific gravity (Gmm) using the Rice test (LS-264 / AASHTO T209), a technician notices that not all air bubbles have been removed from the loose asphalt sample under vacuum. What is the most likely consequence of this error?

Accepted Answer

The calculated Gmm will be erroneously high, leading to a lower calculated air void content.

Answer

The calculated asphalt content (AC) will be incorrect.

Answer

The calculated Gmm will be erroneously low, leading to a higher calculated air void content.

Answer

The bulk specific gravity (Gmb) of the compacted sample will be artificially increased.

Question 4

A CCIL certified technician is testing a compacted asphalt core sample and finds that it absorbs more than 2.0% water by volume when tested according to AASHTO T 166 / ASTM D2726. Which of the following procedures should be used to determine the bulk specific gravity?

Accepted Answer

Use the paraffin-coated specimen method (AASHTO T 275) or a vacuum sealing method.

Answer

Continue with the AASHTO T 166 method but submerge the sample for a shorter duration.

Answer

Use the CoreDry apparatus to rapidly dry the sample before weighing.

Answer

Report the result as invalid and request a new sample from a different location.

Question 5

A scenario-based question: A compliance test on a plant-produced Superpave mix shows that the Voids in Mineral Aggregate (VMA) is below the minimum specification limit. Which of the following is the MOST likely cause?

Accepted Answer

The aggregate gradation is too fine, lacking sufficient space in the particle structure.

Answer

Asphalt cement content is too high.

Answer

The compactive effort in the gyratory compactor was too low.

Answer

The amount of reclaimed asphalt pavement (RAP) in the mix is too low.

Question 6

Which CCIL certification type is specifically required for a laboratory performing routine quality control tests on asphalt mixes, such as asphalt content, gradation, and compaction, to ensure they meet project specifications?

Accepted Answer

Type B - Mix Compliance

Answer

Type A - Mix Design

Answer

Type F - Performance Graded Asphalt Binder

Answer

Type E - Recovered Penetration