CCIL Asphalt Mix Compliance Testing 3

Question 1

Which distress mechanism does the Indirect Tensile Strength (IDT) test primarily evaluate in asphalt mixtures?

Accepted Answer

Thermal cracking at low temperatures

Answer

The IDT test is used to evaluate the resistance of asphalt mixtures to thermal cracking at low temperatures.

Question 2

In aggregate consensus property testing, what is the maximum allowable uncompacted void content for fine aggregate angularity (FAA) for a 10-million+ ESALs traffic level?

Accepted Answer

45% minimum

Answer

Superpave requires a minimum FAA of 45% for traffic levels of 10 million or more ESALs for surface course aggregates.

Question 3

What is the role of a correction factor when using the ignition oven test for asphalt binder content determination?

Accepted Answer

Compensates for aggregate mass loss during ignition

Answer

The correction factor accounts for aggregate mass loss during ignition, which can artificially inflate the calculated binder content.

Question 4

Which ASTM or AASHTO standard covers the determination of bulk specific gravity (Gmb) of compacted asphalt specimens?

Accepted Answer

AASHTO T 166

Answer

AASHTO T 166 is the standard test method for bulk specific gravity of compacted hot mix asphalt using saturated surface-dry specimens.

Question 5

When evaluating moisture susceptibility, the Tensile Strength Ratio (TSR) must typically meet a minimum value of:

Accepted Answer

0.80

Answer

AASHTO T 283 requires a minimum TSR of 0.80 (80%) to demonstrate adequate moisture resistance in asphalt mixtures.

CCIL - Canadian Council of Independent Laboratories Practice Test

CCIL - Canadian Council of Independent Laboratories Practice Test

CCIL Asphalt Mix Compliance Testing 3