GDOT ASPHALT QC LEVEL 1 2026
CONSTRUCTION QUALITY CONTROL
WORKBOOK SOLVED QUESTIONS
COMPILATION
◉ Ram pressure for gyratory compaction is
Answer: 600 +/- 18 kpA perpendicular to the axis
◉ RPM the gyratory compactor operates at
Answer: 30 +/- .5 gyrations a minute
◉ Gyratory (GMB) and Rice (GMM) samples must be conditioned at
what temp and for how long
Answer: compaction temp +/- 9 for 1 hour +/- 5minutes and mix
should be within +/-20° of compaction temp
◉ The mold and base plate for the gyratory compactor should be in
the oven for how long
Answer: 30 to 60 minutes
◉ Target specific height for pills
Answer: 115.0mm +/- 5mm
, ◉ How do you determine aggregate is dry?
Answer: Weigh the material every 15 minutes when it has lost less
than 0.5 grams is it considered dry
◉ Bulk specific gravity (pill) water weight is determined after
Answer: 4 +/- 1 minute
◉ When the pill is removed from the water it should be blotted and
weighed in what time and how
Answer: 5 seconds with a top and bot flip and then a roll roll
The towel should be damp
◉ Formula for GMB (BSG)
Answer: Dry ÷ (SSD - Water Weight)
Round to 3 decimal places
◉ Calculating air voids
Answer: (Gmm - Gmb ÷ Gmm) × 100
◉ For Asphalt Binders PG stands for what?
Answer: Performance Graded
CONSTRUCTION QUALITY CONTROL
WORKBOOK SOLVED QUESTIONS
COMPILATION
◉ Ram pressure for gyratory compaction is
Answer: 600 +/- 18 kpA perpendicular to the axis
◉ RPM the gyratory compactor operates at
Answer: 30 +/- .5 gyrations a minute
◉ Gyratory (GMB) and Rice (GMM) samples must be conditioned at
what temp and for how long
Answer: compaction temp +/- 9 for 1 hour +/- 5minutes and mix
should be within +/-20° of compaction temp
◉ The mold and base plate for the gyratory compactor should be in
the oven for how long
Answer: 30 to 60 minutes
◉ Target specific height for pills
Answer: 115.0mm +/- 5mm
, ◉ How do you determine aggregate is dry?
Answer: Weigh the material every 15 minutes when it has lost less
than 0.5 grams is it considered dry
◉ Bulk specific gravity (pill) water weight is determined after
Answer: 4 +/- 1 minute
◉ When the pill is removed from the water it should be blotted and
weighed in what time and how
Answer: 5 seconds with a top and bot flip and then a roll roll
The towel should be damp
◉ Formula for GMB (BSG)
Answer: Dry ÷ (SSD - Water Weight)
Round to 3 decimal places
◉ Calculating air voids
Answer: (Gmm - Gmb ÷ Gmm) × 100
◉ For Asphalt Binders PG stands for what?
Answer: Performance Graded
