|
|
|
|
|
|
|
| Item
| Vacuum Chamber
|
|
| Description
| Capable of withstanding partial vacuums lower than 30
mm Hg absolute pressure, of appropriate size and such that water has
access to all sides of the specimen
|
|
|
|
|
|
| Calibration Item
| Check physical condition
|
|
| Calibration Procedure
| Visual
|
|
| Calibration Interval
| 12 months
|
|
|
|
|
|
| Item
| Vacuum System
|
|
| Description
| Vacuum pump or aspirator, and a manometer or pressure
gauge for measuring the vacuum
|
|
|
|
|
|
| Calibration Item
| Verify proper operation
|
|
| Calibration Procedure
| Measure pressure
|
|
| Calibration Interval
| 12 months
|
|
|
|
|
|
| Item
| Water Bath
|
|
| Description
| Constant temperature, able to maintain a temperature of
60 ± 1 C and of sufficient capacity to hold fifteen specimens
|
|
|
|
|
|
| Calibration Item
| Verify temperature readings; check water level
|
|
| Calibration Procedure
| Verify with calibrated thermometer
|
|
| Calibration Interval
| Daily or prior to use
|
|
|
|
|
|
| Item
| Oven
|
|
| Description
| Capable of heating to 350 F
|
|
|
|
|
|
| Calibration Item
| Verify temperature readings
|
|
| Calibration Procedure
| Verify with calibrated thermometer
|
|
| Calibration Interval
| 4 months
|
|
|
|
|
|
| Item
| Balance
|
|
| Description
| Readable to 0.1% of sample mass or better
|
|
|
|
|
|
| Calibration Item
| Verify mass readings
|
|
| Calibration Procedure
| AASHTO M 231
|
|
| Calibration Interval
| 12 months
|
|
|
|
|
|
| Item
| Load measurement system with recording device
|
|
| Description
| Must have breaking head and loading jack, as per AASHTO
T 245
|
|
|
|
|
|
| Calibration Item
| Verify load measurements
|
|
| Calibration Procedure
| Measure loads
|
|
| Calibration Interval
| 12 months
|
|
|
|
|
|
|
|
|
|
|
| Reference the following specifications
|
|
|
|
|
|
| AASHTO T 245
| Resistance to Plastic Flow of Bituminous Mixtures
Using Marshall Apparatus
|
|
|
|
|