NETTCP Material Specifications 2

Question 1

According to AASHTO M 43, what sieve size defines the boundary between fine and coarse aggregate?

Accepted Answer

No. 4 (4.75 mm)

Answer

AASHTO M 43 defines the No. 4 (4.75 mm) sieve as the boundary between fine and coarse aggregate.

Question 2

Which AASHTO designation covers requirements for Superpave Performance-Graded (PG) asphalt binders?

Accepted Answer

AASHTO M 320

Answer

AASHTO M 320 specifies Performance-Graded asphalt binder requirements used in the Superpave system.

Question 3

What does the 'L' value in a PG 64-22 asphalt binder designation represent?

Accepted Answer

The minimum pavement temperature in °C at which the binder must perform

Answer

In PG 64-22, the -22 represents the minimum pavement design temperature in degrees Celsius.

Question 4

For hot mix asphalt, which property of coarse aggregate is measured by AASHTO T 96 (Los Angeles Abrasion)?

Accepted Answer

Resistance to degradation by abrasion and impact

Answer

AASHTO T 96 measures aggregate resistance to degradation by abrasion and impact using the Los Angeles machine.

Question 5

Which type of portland cement is most commonly specified for general construction of transportation structures in New England?

Accepted Answer

Type I/II

Answer

Type I/II cement meets requirements for general use and moderate sulfate resistance, making it the standard choice for transportation construction.

(NETTCP) New England Transportation Technician Certification Program Practice Test