Questions and CORRECT Answers
Under the Quality management system (QMS) specification for asphalt pavements, it refers to
the Contractors Responsibility as: - CORRECT ANSWER - Quality Control
During the production of mix for a NCDOT project the Contractor must provide a Certified
______ Plant Technician at all times at each plant site used - CORRECT ANSWER -
Level I
Under the NCDOT QMS specification level I, Level II, and roadway Technicians must be
certified through the ______ Technician Certification program. - CORRECT ANSWER -
NCDOT
With each paving operation and at others times during placement of the pavement the contractor
must [provide a certified _____ technician - CORRECT ANSWER - Roadway
The final product of the SHRP asphalt research program was a new system referred to as
SUPERPAVE which stands for: - CORRECT ANSWER - Superior Preforming Asphalt
Pavements
What basic components compose Asphalt Pavements? - CORRECT ANSWER -
Aggregate, Binder, and Air Voids
The grade of asphalt binder used most in NCDOT standard SUPERPAVE is ______ - CORRECT
ANSWER - PG64-22
Performance grade (PG) bunders are designated with grades such as PG64-22. The first number,
64, us often called the ______ - CORRECT ANSWER - High Temperature Grade
Performance grade (PG) bunders are designated with grades such as PG64-22. The second
number, -22, us often called the ______ - CORRECT ANSWER - Low Temperature Grade
, Name three basic asphalt mix types - CORRECT ANSWER - Surface, Intermediate, and
Base Courses
19.0mm mixes are classified as what type of Superpave Mix? - CORRECT ANSWER -
Intermediate
Another name for the document or the "recipe" for an asphalt mix which displays the sources and
grades of materials, blend proportions of aggregates, specific gravity information, and other
applicable data and notes is - CORRECT ANSWER - The Job Mix Formula
The overall objective in designing asphalt mixes is to determine an economical blend of
gradation of aggregates (within specifications limits) and to a corresponding asphalt content that
yields a mix having: - CORRECT ANSWER - Sufficient asphalt, a mix resistant to
permanent deformation, voids, and workability
The mixing temperature for a PG 64-22 Superpave asphalt mix is - CORRECT
ANSWER - 250-290 degF
What do the 8 digits of the JMF mean? - CORRECT ANSWER - First 2 are the Year
which the design was approved; The third from the last number us a plant number; the next to the
last digit is the non-strip additive Amount; Last digit is a JMF sequence number based in this mix
What are the two types of asphalt plants commonly used in North Carolina? - CORRECT
ANSWER - Batch and Drum Plants
True of False - All asphalt plants that produce mix for the NCDOT projects must be certified by
the NCDOT as meeting all requirements if the current NCDOT Standards Specifications -
CORRECT ANSWER - True
The difference between drum-mix plants and batch mix plants is that within the drum: -
CORRECT ANSWER - All are correct (Mixed with the asphalt binder, The aggregate is
dried and heated)