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

Question 1

What test method is used to determine the in-place density of compacted hot mix asphalt using a nuclear gauge on a pavement project?

Accepted Answer

ASTM D2950 / AASHTO T 355

Answer

ASTM D2950 (AASHTO T 355) covers the use of nuclear methods to measure the density of in-place bituminous paving mixtures without coring.

Question 2

What is the minimum air void content typically specified for compacted hot mix asphalt pavement lifts to ensure adequate durability?

Accepted Answer

3%

Answer

A minimum of 3% air voids in the compacted mat is specified to prevent flushing and rutting while maintaining adequate aggregate interlock.

Question 3

During asphalt paving operations, what is the maximum allowable pavement temperature for breakdown rolling to begin on most projects?

Accepted Answer

Above 120°C (250°F)

Answer

Breakdown rolling must begin when the mat temperature is still above 120°C to achieve proper compaction before the asphalt stiffens and resists densification.

Question 4

What CCIL certification type is required for technicians conducting asphalt pavement field inspection and density testing on highway projects?

Accepted Answer

CCIL Type II (Asphalt)

Answer

CCIL Type II certification covers hot mix asphalt field testing and inspection, including density, temperature, and sampling from the paving train.

Question 5

What is the purpose of a longitudinal joint in asphalt pavement construction?

Accepted Answer

To connect adjacent lanes paved in separate passes while maintaining density at the seam

Answer

Longitudinal joints form where two adjacent lanes meet and must be properly lapped and compacted to avoid a weak plane that accelerates cracking.

CCIL - Canadian Council of Independent Laboratories Practice Test

CCIL - Canadian Council of Independent Laboratories Practice Test

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