|
|
| All equipment shall be inspected for compliance with appropriate dimensions, 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 | Sieve Shaker | |
| Description | Manual or mechanical, meeting requirements of AASHTO T-27, Sec 7.4 | |
| Calibration Item | See the general statement above | |
| Calibration Procedure | ||
| Calibration Interval | ||
|
|
| |
| Item | Sieves | |
| Description | Appropriate sizes which include at least the 75mm, 50mm, 19mm, 12.5mm, 9.5mm, 4.75mm 2.36mm, 2mm, 0.425, and .075 mm sieves | |
| Calibration Item | Opening size | |
| Calibration Procedure | AASHTO M 92 | |
| Calibration Interval | Not stated | |
|
|
| |
| Item | Balance | |
| Description | Conforms to AASHTO M 231, accurate to 0.1 percent of sample mass | |
| Calibration Item | Accuracy and condition | |
| Calibration Procedure | AASHTO M 231, Sec. 4.2 and 4.3 | |
| Calibration Interval | Not stated | |
|
|
| |
| Item | Oven | |
| Description | Thermostatically controlled, forced draft, 110C + 5 | |
| Calibration Item | Temperature | |
| Calibration Procedure | AASHTO 265, sec. 3.1 | |
| Calibration Interval | Not stated | |
|
|
|
| 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 | |
|
|
| |
| Reference the following specifications | ||
| AASHTO T 2 | Standard Practice for Sampling Aggregates | |
| AASHTO T 11 | Materials Finer Than 75-(m (No. 200) Sieve in Mineral Aggregates by Washing | |
| AASHTO T 248 | Reducing Samples of Aggregate to Testing Size | |
|
|
|