T 209 Maximum Specific Gravity Rice Test Flashcards
This test method measures the theoretical maximum specific gravity of compacted HMA specimens?
False
The HMA mixture mixed in the laboratory should always be conditioned for short term aging?
True
For the mass determination in water how long should you suspend the container and contents in the bath before determining the mass in water?
10 minutes ±1 minute
Particles of the asphalt mixture larger than 1/4 inch should be separated by hand?
True
For mass determination in air or in water what should be the temperature of the water?
77°F ± 2°
HMA theoretical maximum specific gravity shall be reported to the nearest .01?
False
Remove air trapped in the sample by applying gradually increased vacuum until the residual pressure manometer reads what?
30 +- 5 mmHg
At the end of the vacuum. Release the vacuum by increasing the pressure at a rate not to exceed?
60 mmHG per second
Calculate the theoretical maximum gravity Gmm for in the water method. A= 2574.0 B=1331.2 C=2843.7
2.425
Calculate the theoretical maximum gravity Gmm for the air method. A=2632.8 B=7336.5 C=8947.3
2.576
How long is the residual pressure to be maintained?
15 ± 1 minute
After the vacuum has been released how much time must you wait before obtaining the mass of container with contents?
10 ± 1 minute
How long is the container in its contents to be immersed in the water bath before mass determination?
10 ± 1 minute
What is the required temperature of the water bath?
77 ± 2° Fahrenheit
The vacuum measurement device shall be standardized how often?
At least annually
The vacuum measurement device shall be readable to what?
2 mmHg
What is the minimum sample size for one inch aggregate?
2500 grams
