PIC PIC Mix Design & Specification Compliance

Question 1

In Superpave mix design, the performance grade (PG) of an asphalt binder is primarily determined by:

Accepted Answer

The high and low pavement design temperatures at the project location

Answer

Superpave PG binder grading is based on the high and low pavement design temperatures at the project site, ensuring the binder performs adequately across the climate range.

Question 2

What does VMA stand for in hot-mix asphalt mix design?

Accepted Answer

Voids in the Mineral Aggregate

Answer

VMA (Voids in the Mineral Aggregate) is the total volume of inter-granular void space in a compacted mix, including air voids and effective asphalt binder content.

Question 3

A job mix formula (JMF) specifies the target gradation and binder content for an HMA mix. On a project, inspectors must verify that production mix properties are within:

Accepted Answer

The allowable tolerances established in the project specifications

Answer

Production mix properties must fall within the specification tolerances established around the JMF targets; deviations outside these limits require corrective action.

Question 4

The Nominal Maximum Aggregate Size (NMAS) of a Superpave mix is defined as:

Accepted Answer

One sieve size larger than the first sieve to retain more than 10% of the aggregate

Answer

NMAS in Superpave is one standard sieve size larger than the first sieve that retains more than 10% of the combined aggregate blend.

Question 5

Which mix design method was widely used before Superpave became the FHWA standard and relies on stability and flow measurements from a standardized hammer-compacted specimen?

Accepted Answer

Marshall Mix Design

Answer

The Marshall Mix Design method, which measures stability and flow of hammer-compacted specimens, was the dominant HMA design procedure before Superpave.

(PIC) Paving Inspector Certification Practice Test

(PIC) Paving Inspector Certification Practice Test

PIC PIC Mix Design & Specification Compliance