FDOT ASPHALT PAVING PLANT LEVEL 1
QUESTIONS AND ANSWERS
Correct weight of mix for gyratory compactor - ANSWER About 4500 -
5000g. Ascertained in the mix design procedure to obtain the height of 115 +/-
5mm
Amount of mix needed for Gmm (rice) samples? - ANSWER 2000-2200g total
or 1000-1100 grams each for two flasks
Required amount of mix for ignition samples? - ANSWER Depends on the
mix. SP & FC 5, 9.5, 12.5 are 1500g. SP 19 is 2000g
Asphalt burns off at what temp - ANSWER 538°C (1000°F)
The furnace must be capable of what temperature - ANSWER 650°C (1200°F)
How often and at what temperature should flasks be calibrated? - ANSWER
77 +/ 2°F of water and once a month or >0.4 grams of dry weight
How many parts of wetting agent to water - ANSWER 1ml wetting agent to
1000ml water
The vacuum applied to flasks for GMM - ANSWER 30 +/- 2mm
Vacuum pressure for GMM must be reached within - ANSWER 2 minutes
, The Orbital Shaker must oscillate at - ANSWER 270 +/- 10 rpms
The vacuum and oscillating test for GMM then continues for how long when it
reaches target pressure - ANSWER 15 +/- 2minutes
Gyratory compaction angle is - ANSWER an internal angle of 1.16 +/-.02
degrees
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
Temperature /and hours the Gyratory and Rice Samples are to be conditioned -
ANSWER compaction temperature +/- 9 for 1 hour +/- 5minutes and mix must
be within +/-20° of compactioin temperature
The number of hours mold and base plate to the gyratory compactor are to
remain in the oven - 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
QUESTIONS AND ANSWERS
Correct weight of mix for gyratory compactor - ANSWER About 4500 -
5000g. Ascertained in the mix design procedure to obtain the height of 115 +/-
5mm
Amount of mix needed for Gmm (rice) samples? - ANSWER 2000-2200g total
or 1000-1100 grams each for two flasks
Required amount of mix for ignition samples? - ANSWER Depends on the
mix. SP & FC 5, 9.5, 12.5 are 1500g. SP 19 is 2000g
Asphalt burns off at what temp - ANSWER 538°C (1000°F)
The furnace must be capable of what temperature - ANSWER 650°C (1200°F)
How often and at what temperature should flasks be calibrated? - ANSWER
77 +/ 2°F of water and once a month or >0.4 grams of dry weight
How many parts of wetting agent to water - ANSWER 1ml wetting agent to
1000ml water
The vacuum applied to flasks for GMM - ANSWER 30 +/- 2mm
Vacuum pressure for GMM must be reached within - ANSWER 2 minutes
, The Orbital Shaker must oscillate at - ANSWER 270 +/- 10 rpms
The vacuum and oscillating test for GMM then continues for how long when it
reaches target pressure - ANSWER 15 +/- 2minutes
Gyratory compaction angle is - ANSWER an internal angle of 1.16 +/-.02
degrees
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
Temperature /and hours the Gyratory and Rice Samples are to be conditioned -
ANSWER compaction temperature +/- 9 for 1 hour +/- 5minutes and mix must
be within +/-20° of compactioin temperature
The number of hours mold and base plate to the gyratory compactor are to
remain in the oven - 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
