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

The aggregate gradation and nominal maximum aggregate size

Answer

The target air void content and voids in the mineral aggregate

Answer

The traffic loading expressed in Equivalent Single Axle Loads (ESALs)

Question 2

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

Accepted Answer

Voids in the Mineral Aggregate

Answer

Variable Mix Acceptance

Answer

Verified Mix Analysis

Answer

Viscosity of Modified Asphalt

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

Exactly the JMF values with no deviation allowed

Answer

5% of the design values regardless of specification requirements

Answer

Values approved by the contractor's quality control technician

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

The sieve size that retains 100% of the aggregate

Answer

The largest aggregate size used in the mix design

Answer

The sieve size that passes 50% of the total 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

Hveem Mix Design

Answer

Gyratory Compaction Method

Answer

SHRP Volumetric Design

Question 6

Target air void content for a Superpave design mix at Ndesign gyrations is:

Accepted Answer

4%

Answer

2%

Answer

6%

Answer

8%