WAQTC Asphalt 2 lab Transportation
technician Qualification program Study
Guide
delivery tolerances ✅ permissible variations from the desired proportions of aggregate and asphalt
binder delivered to the pugmill
density ✅ the ratio of mass to volume of a substance. usually expressed in l/ft3
design professional ✅ the designer of a project. this individual or entity may provide services
relating to the planning, design, and construction of a project, possibly including material testing and
construction inspection. sometimes called a contractor, since this individual or entity contracts with
the owner
dryer ✅ an apparatus that dries aggregate and heats it to specified temperatures.
dry mix time ✅ The time interval between introduction of aggregate into the pugmill and the
addition of asphalt cement.
durability ✅ the property of concrete that describes its ability to resist disintegration by
weathering and traffic. included under weathering are changes in the pavement and aggregate due
to the action of water, including freeing and thawing.
dust proportion DP (dust to effective (asphalt) binder ratio) ✅ the percent passing the No. 200
sieve divided by the percent of effective asphalt binder.
Effective Specific Gravity (Gse) ✅ the ratio of the mass in air of a unit volume of a permeable
material (excluding voids permeable to asphalt binder) at a stated temperature to the mass in air (of
equal density) of an equal volume of gas-free distilled water at a stated temperature.
effective diameter (effective size) ✅ D10, particle diameter corresponding to 10 percent finer or
passing.
embankment ✅ controlled, compacted material between the subgrade and subbase or base in a
roadway.
, End-Result Specifications ✅ Specifications that require the Constructor to take the entire
responsibility for supplying a product or an item of construction. The Owner's (the highway agency's)
responsibility is to either accept or reject the final product or to apply a price adjustment that is
commensurate with the degree of compliance with the specifications. Sometimes called
performance specifications, although considered differently in highway work. (See performance
specifications.)
family of curves ✅ a group of soil moisture-density relationship (curves) determined using AASHTO
T 99 T 180, which reveal certain similarities and trends characteristic of the soil type and source.
field operating procedure (FOP) ✅ Procedure used in field testing on a construction site or in a field
laboratory. (Based on AASHTO or NAQTC test methods.)
fineness modulus ✅ Sum of percentage retained on each sieve (from 1.5 in to sieve 100) divided by
100, higher FM means coarser aggregate
1<FM<4
fines ✅ portion of a soil or aggregate finer that 75 um (No. 200) sieve. also silts and clays
fractured criteria ✅ the specified requirement for fractured particles determined by each agency
fractured face ✅ an angular, rough, or broken surface of an aggregate particle created by crushing
or by other means. a face is considered a "fractured face" whenever one-half or more of the
projected area, when viewed normal to the face, is fractured with sharp and well-defined edges. this
excludes small nicks
fractured particle ✅ a particle of aggregate having at least the minimum number of fractured faces
specified
free water ✅ water on aggregate available for reaction with hydraulic cement. mathematically, the
difference between total moisture content and absorbed moisture content.
absorbed water ✅ Water drawn into a solid by absorption, and having physical properties similar
to ordinary water.
technician Qualification program Study
Guide
delivery tolerances ✅ permissible variations from the desired proportions of aggregate and asphalt
binder delivered to the pugmill
density ✅ the ratio of mass to volume of a substance. usually expressed in l/ft3
design professional ✅ the designer of a project. this individual or entity may provide services
relating to the planning, design, and construction of a project, possibly including material testing and
construction inspection. sometimes called a contractor, since this individual or entity contracts with
the owner
dryer ✅ an apparatus that dries aggregate and heats it to specified temperatures.
dry mix time ✅ The time interval between introduction of aggregate into the pugmill and the
addition of asphalt cement.
durability ✅ the property of concrete that describes its ability to resist disintegration by
weathering and traffic. included under weathering are changes in the pavement and aggregate due
to the action of water, including freeing and thawing.
dust proportion DP (dust to effective (asphalt) binder ratio) ✅ the percent passing the No. 200
sieve divided by the percent of effective asphalt binder.
Effective Specific Gravity (Gse) ✅ the ratio of the mass in air of a unit volume of a permeable
material (excluding voids permeable to asphalt binder) at a stated temperature to the mass in air (of
equal density) of an equal volume of gas-free distilled water at a stated temperature.
effective diameter (effective size) ✅ D10, particle diameter corresponding to 10 percent finer or
passing.
embankment ✅ controlled, compacted material between the subgrade and subbase or base in a
roadway.
, End-Result Specifications ✅ Specifications that require the Constructor to take the entire
responsibility for supplying a product or an item of construction. The Owner's (the highway agency's)
responsibility is to either accept or reject the final product or to apply a price adjustment that is
commensurate with the degree of compliance with the specifications. Sometimes called
performance specifications, although considered differently in highway work. (See performance
specifications.)
family of curves ✅ a group of soil moisture-density relationship (curves) determined using AASHTO
T 99 T 180, which reveal certain similarities and trends characteristic of the soil type and source.
field operating procedure (FOP) ✅ Procedure used in field testing on a construction site or in a field
laboratory. (Based on AASHTO or NAQTC test methods.)
fineness modulus ✅ Sum of percentage retained on each sieve (from 1.5 in to sieve 100) divided by
100, higher FM means coarser aggregate
1<FM<4
fines ✅ portion of a soil or aggregate finer that 75 um (No. 200) sieve. also silts and clays
fractured criteria ✅ the specified requirement for fractured particles determined by each agency
fractured face ✅ an angular, rough, or broken surface of an aggregate particle created by crushing
or by other means. a face is considered a "fractured face" whenever one-half or more of the
projected area, when viewed normal to the face, is fractured with sharp and well-defined edges. this
excludes small nicks
fractured particle ✅ a particle of aggregate having at least the minimum number of fractured faces
specified
free water ✅ water on aggregate available for reaction with hydraulic cement. mathematically, the
difference between total moisture content and absorbed moisture content.
absorbed water ✅ Water drawn into a solid by absorption, and having physical properties similar
to ordinary water.
