FDOT ASPHALT PAVING LEVEL 2 EXAM
QUESTIONS WITH COMPLETE
SOLUTIONS
GMM stands for - Answer-Gravity mixture maximum
GMB stands for - Answer-Gravity mixture bulk
GSB - Answer-stands for gravity stone bulk and is used to calculate the FC-5 target
spread rate and the VMA for dense graded mixes.
The formula for airvoids is - Answer-% = 100 x (gmm - gmb / gmm)
The formula for roadway density is - Answer-% gmm = (gmb/gmm) x 100
Determining a Target asphalt spread rate for non FC-5 mixes - Answer-target spread
rate = thickness x gmm (from mix design) x 43.3
(round to the nearest whole number)
What is the tolerance for the asphalt spread rate target? - Answer-+- 5%
How do you calculate the tolerance for the asphalt spread rate target? - Answer-Ex:
Target Spread Rate = 165 lb/syds
165 x 0.05 (%5) = 8 lb/syd
Then you use the 8 as a + or - from 165 so the range is from 157 to 173 lbs/syd
Formula for determining the asphalt spread rate for an FC-5 mix? - Answer-target
spread rate = thickness x gsb (from mix design) x 40.5
(round to the nearest whole number)
A prime coat being used on lime rock, sand-clay, shell, and shell stabilized based have
an application rate of what? - Answer-Limerock: greater than or equal to 0.10 gal/syd
Sand-Clay, Shell, Shell Base: greater than or equal to 0.15 gal/syd
You do not test overbuild for density unless it is? - Answer-Greater than one inch
Where do you find approved tack products? - Answer-On the FDOT Approved products
list (APL)
During night what is the tack you usually use? - Answer-PG 52-28 or an approved
emulsion
, What are PG binders tested for high temperature wise? - Answer-A 7 day max
pavement temp of 67C
What are PG binders tested for low temperature wise? - Answer--22C
Friction course has what PG binders in its makeup? - Answer-PG 76-22 (PMA)
PG 76-22 (ARB)
PG 82-22 (PMA)
Asphalt cement does what while hot? - Answer-Acts as a lubricant
Asphalt cement does what while cold? - Answer-It becomes a glue and holds the rocks
together
PG 76-22 (PMA) is especially good at what? - Answer-Reducing rutting.
What is an asphalt treated permeable base? - Answer-Concrete placed over asphalt
Friction course mixes uses a what kind of aggregate? - Answer-A polish resistant
aggregate
What is a polish resistant aggregate? - Answer-Oolitic limestone (Miami-Dade County)
Granite (Georgia, Alabama, Nova Scotia)
Other Approved Sources
Asphalt generally has a minimum thickness to be laid at but what determines how thick?
- Answer-The plans developed by the designer does
What is the difference between Superpave mixes and Friction Course mixes? - Answer-
Polish resistant aggregate and special PMA or ARB binders are used in friction course
mixes.
A shoulder less than 5 ft with FC-5 can not have what? - Answer-A joint. Pave the
outside of the mainline and the shoulder at the same time.
What tack Can you use during the day? - Answer-Any kind of tack
When determining the specification rate for 52-28 tack you do what? - Answer-Multiply
the rate by 0.6
What is the tack application rate tolerance? - Answer-+/- 0.01 gal/syd
Step 1 for figuring the tack spread rate - Answer-Find the length of the tack shot
Station - station = ft
Step 2 for figuring the tack spread rate - Answer-Find the square yards
QUESTIONS WITH COMPLETE
SOLUTIONS
GMM stands for - Answer-Gravity mixture maximum
GMB stands for - Answer-Gravity mixture bulk
GSB - Answer-stands for gravity stone bulk and is used to calculate the FC-5 target
spread rate and the VMA for dense graded mixes.
The formula for airvoids is - Answer-% = 100 x (gmm - gmb / gmm)
The formula for roadway density is - Answer-% gmm = (gmb/gmm) x 100
Determining a Target asphalt spread rate for non FC-5 mixes - Answer-target spread
rate = thickness x gmm (from mix design) x 43.3
(round to the nearest whole number)
What is the tolerance for the asphalt spread rate target? - Answer-+- 5%
How do you calculate the tolerance for the asphalt spread rate target? - Answer-Ex:
Target Spread Rate = 165 lb/syds
165 x 0.05 (%5) = 8 lb/syd
Then you use the 8 as a + or - from 165 so the range is from 157 to 173 lbs/syd
Formula for determining the asphalt spread rate for an FC-5 mix? - Answer-target
spread rate = thickness x gsb (from mix design) x 40.5
(round to the nearest whole number)
A prime coat being used on lime rock, sand-clay, shell, and shell stabilized based have
an application rate of what? - Answer-Limerock: greater than or equal to 0.10 gal/syd
Sand-Clay, Shell, Shell Base: greater than or equal to 0.15 gal/syd
You do not test overbuild for density unless it is? - Answer-Greater than one inch
Where do you find approved tack products? - Answer-On the FDOT Approved products
list (APL)
During night what is the tack you usually use? - Answer-PG 52-28 or an approved
emulsion
, What are PG binders tested for high temperature wise? - Answer-A 7 day max
pavement temp of 67C
What are PG binders tested for low temperature wise? - Answer--22C
Friction course has what PG binders in its makeup? - Answer-PG 76-22 (PMA)
PG 76-22 (ARB)
PG 82-22 (PMA)
Asphalt cement does what while hot? - Answer-Acts as a lubricant
Asphalt cement does what while cold? - Answer-It becomes a glue and holds the rocks
together
PG 76-22 (PMA) is especially good at what? - Answer-Reducing rutting.
What is an asphalt treated permeable base? - Answer-Concrete placed over asphalt
Friction course mixes uses a what kind of aggregate? - Answer-A polish resistant
aggregate
What is a polish resistant aggregate? - Answer-Oolitic limestone (Miami-Dade County)
Granite (Georgia, Alabama, Nova Scotia)
Other Approved Sources
Asphalt generally has a minimum thickness to be laid at but what determines how thick?
- Answer-The plans developed by the designer does
What is the difference between Superpave mixes and Friction Course mixes? - Answer-
Polish resistant aggregate and special PMA or ARB binders are used in friction course
mixes.
A shoulder less than 5 ft with FC-5 can not have what? - Answer-A joint. Pave the
outside of the mainline and the shoulder at the same time.
What tack Can you use during the day? - Answer-Any kind of tack
When determining the specification rate for 52-28 tack you do what? - Answer-Multiply
the rate by 0.6
What is the tack application rate tolerance? - Answer-+/- 0.01 gal/syd
Step 1 for figuring the tack spread rate - Answer-Find the length of the tack shot
Station - station = ft
Step 2 for figuring the tack spread rate - Answer-Find the square yards
