CCIL CCIL - Canadian Council of Independent Laboratories Pavement Construction and Inspection Questions and Answers 1 — 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?
- ASTM D2950 / AASHTO T 355 (Correct answer)
- ASTM D1188
- ASTM D2726
- ASTM D4123
Correct answer: ASTM D2950 / AASHTO T 355
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?
- 3% (Correct answer)
- 1%
- 5%
- 8%
Correct answer: 3%
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?
- Above 120°C (250°F) (Correct answer)
- Below 80°C (175°F)
- Above 150°C (300°F)
- Below 60°C (140°F)
Correct answer: Above 120°C (250°F)
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?
- CCIL Type II (Asphalt) (Correct answer)
- CCIL Type I (Soils)
- CCIL Type III (Concrete)
- CCIL Type IV (Laboratory)
Correct answer: CCIL Type II (Asphalt)
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?
- To connect adjacent lanes paved in separate passes while maintaining density at the seam (Correct answer)
- To allow thermal expansion of the asphalt in hot weather
- To provide a drainage channel along the pavement edge
- To separate the binder course from the surface course
Correct answer: To connect adjacent lanes paved in separate passes while maintaining density at the seam
Longitudinal joints form where two adjacent lanes meet and must be properly lapped and compacted to avoid a weak plane that accelerates cracking.
Question 6: Which pavement distress type is characterized by interconnected cracks forming a pattern resembling alligator skin, typically caused by fatigue failure?
- Alligator (fatigue) cracking (Correct answer)
- Thermal transverse cracking
- Reflection cracking
- Edge cracking
Correct answer: Alligator (fatigue) cracking
Alligator cracking results from repeated traffic loading causing tensile fatigue at the bottom of the asphalt layer, with cracks propagating upward to the surface.
CCIL CCIL - Canadian Council of Independent Laboratories Pavement Construction and Inspection Questions and Answers 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?