Equipment Checklist for AASHTO T 85 - 91
Specific Gravity and Absorption of Coarse Aggregate
 
All equipment shall be inspected for compliance with appropriate dimension s, as stated in each standard, as well as to determine if it is in satisfactory operation condition (i.e. clean, tight and serviceable). Inspection shall occur at least annually, or whenever there is reason to suspect nonconformance with the standard.

 
Item Balance
Description Readable to 0.1% of sample mass or better
   
Calibration Item Verify mass readings
Calibration Procedure AASHTO M 231, Class G5
Calibration Interval 12 months
Item Sieves
Description #4, #8, or other as needed
   
Calibration Item Check openings and physical condition
Calibration Procedure AASHTO M 92
Calibration Interval 6 months
Item Sample container
Description Wire basket of 3.35 mm (No. 6) or finer mesh, or appropriate bucket
   
Calibration Item Check physical condition
Calibration Procedure Visual
Calibration Interval 12 months
Item Oven
Description Must be maintained at 110 ± 5 C
   
Calibration Item Verify temperature
Calibration Procedure Verify with calibrated thermometer
Calibration Interval 4 months
Item Suspension Apparatus
Description Wire suspending container should be of smallest practical size
Water level must completely cover the container
   
Calibration Item Check Physical Condition
Calibration Procedure Visual
Calibration Interval 12 months
Item Water Bath
Description Maintained at a constant temperature of 23 ± 1.7 C and with a constant water level
   
Calibration Item Verify temperature; Check water level
Calibration Procedure Verify with calibrated thermometer
Calibration Interval Daily or Prior to Use
Item Thermometer
Description Capable of accurately measuring temperatures used in this test method
   
Calibration Item Verify temperature readings
Calibration Procedure ASTM E 1, ASTM E 77
Calibration Interval 6 months
Item Incidental Equipment
Description Pans, spoon, hairdryer (optional)
   
Calibration Item Check physical condition
Calibration Procedure Visual
Calibration Interval 12 months
   
Reference the following specifications
AASHTO T 2 Standard Practice for Sampling Aggregates
AASHTO T 27 Sieve Analysis of Fine and Coarse Aggregates
AASHTO T 84 Specific Gravity and Absorption of Fine Aggregate
AASHTO T 248 Reducing Samples of Aggregate to Testing Size
AASHTO T 255 Total Moisture Content of Aggregate by Drying