PIC Aggregate & Binder Specifications 2

Question 1

Which AASHTO specification governs the performance grading (PG) system for asphalt binders used in HMA pavements?

Accepted Answer

AASHTO M 320

Answer

AASHTO M 320 establishes the performance-graded (PG) asphalt binder specification, including temperature-based grade designations.

Question 2

A PG 76-22 binder is designed to perform in high pavement temperatures up to:

Accepted Answer

76°C

Answer

In the PG grading system, the first number (76) represents the maximum pavement temperature (°C) at which the binder is designed to perform.

Question 3

Which test measures the low-temperature cracking resistance of an asphalt binder by evaluating its creep stiffness?

Accepted Answer

Bending Beam Rheometer (BBR)

Answer

The Bending Beam Rheometer (BBR) measures the creep stiffness and m-value of asphalt binder at low temperatures to predict thermal cracking resistance.

Question 4

The Los Angeles (L.A.) Abrasion test evaluates aggregate resistance to:

Accepted Answer

Degradation and wear

Answer

The L.A. Abrasion test measures aggregate toughness and resistance to degradation through abrasion and impact using steel balls in a rotating drum.

Question 5

In Superpave mix design, the term 'restricted zone' historically referred to a region on the:

Accepted Answer

Aggregate gradation chart where blends should avoid

Answer

The Superpave restricted zone was a band on the 0.45 power gradation chart that aggregate blends were originally discouraged from passing through, though this requirement was later eliminated.

(PIC) Paving Inspector Certification Practice Test

(PIC) Paving Inspector Certification Practice Test

PIC Aggregate & Binder Specifications 2