Theoretical Maximum Specific Gravity
What is this test commonly referred to as?
What is the symbol used for this test?
And what is the value used in?
RICE
Gmm
Used in calculation for % compaction of HMA cores and % air voids of lab compacted specimens
What does the ignition oven test determine and how?
% asphalt binder by burning away the binder
What does a gradation determine?
particle size distribution of fine and coarse aggregate.
Difference between this method and an ignition furnace?
rapid determination of AC (% binder)
Describe the flask calibration.
Done monthly
Fill with water 77 +/- 1 F
Completely full, cover plate, no air bubbles, dry exterior
average of last 3 weights= calibration weight
Describe the ignition furnace. Temperature, internal scale, data collection system, mass loss.
1000 F
internal scale 0.1g
internal computer- data collection- time, temp, %loss
Audible alarm when mass loss does not exceed 0.01 g for 3 minutes
What sieve should be over the #200?
#8 or #16
Where should this equipment be stored?
33 ft away from other radioactive sources
3 feet from hydrogenous materials and liquids
used in same location (ideally)
New correlations and background measurements when equipment is moved
Removed entrapped air, what should the manometer read?
How long should the sample be shaken for?
28 +/- 2 mm Mercury (Hg)
15 +/- 2 minutes
Describe the testing procedure and calculation
Record sample basket weight, basket and sample weight. Enter sample weight into oven.
Remove when alarm sounds (no loss greater than 0.01%over 3 minutes)
weigh after 40 +/- 5 mintues
%AC=initial-final/initial x 100
How is the % passing #200 determined?
what are the results reported to?
B-C/B x 100
dry weight before wash-dry weight after wash/dry weight before wash x 100
0.1% unless results are 10% or greater
Your sample is done shaking, describe the rest of the procedure.
release vacuum slowly
fill with water 77 +/- 1 F
place in water bath at same temp and let stabilize or up to 10 minutes
place cover and record weight
Verify that total weight on furnace scale is within how many grams of the external scale?
+/- 5 grams
What are the weights retained on the sieve measured to?
The total must be within what % of the beginning weight?
0.1 g
0.3%
How to determine correction factor
3 correlation points
optimum, -1.0, +1.0%
16 minute count
How do you calculate the RICE?
What should the 2 values be within?
how do you convert to pcf?
A/(A+D-E)
dry/(dry+calibration-flask, water, sample)\
within 0.011
multiply by 62.4
How many correction factor samples are made?
What do you report the percentages to?
How to calculate correction factor? and what must the samples be within of each other
2 lab mixed, 1 blank (aggregate only)
0.01%
difference between 2 samples. must be within 0.15 of each other
How to calculate % retained on a sieve and % passing on a sieve?
What is % passing reported to?
% retained= sieve weight/dry weight x 100
% passing= 100- %retained
Report % passing to nearest whole number, but #200 reported to the nearest 0.1%
what is the dry aggregate count and procedure?
establish a baseline, determine whether changes in agg properties are affecting AC results
dry at 300 +/- 15 f
fill pan 1/2 way, drop from 1" x4
Overfill, drop from 1" x4
strike off using sawing motion
record weight, and temp, run 16-min baseline