|
|
| 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 | Sieves | |
| Description | Appropriate sizes which include at least the 50mm, 19mm, 4.75mm 2mm, and 0.425 mm. | |
| Calibration Item | Opening Size | |
| Calibration Procedure | AASHTO M 92 | |
| Calibration Interval | Not stated | |
|
|
| |
| Item | Pulverizing Apparatus | |
| Description | Mortar and rubber-tipped pestle, rubber covered power muller | |
| Calibration Item | See the general statement above | |
| Calibration Procedure | ||
| Calibration Interval | ||
|
|
| |
| Item | Sample Splitter | |
| Description | Riffle splitter, meeting requirements of AASHTO T 87, Sec. 2.5 | |
| Proportional splitting, in accordance with AASHTO T 248, (canvas cloth and shovel) | ||
| Calibration Item | See general statement above. | |
| Calibration Procedure | ||
| Calibration Interval | ||
|
|
| |
| Item | Drying Apparatus (Optional) | |
| Description | Any device capable of drying samples at temperatures below 60C. | |
| Calibration Item | See general statement above. | |
| Calibration Procedure | ||
| Calibration Interval | ||
|
|
| |
| Item | Balance | |
| Description | Conforms to AASHTO M 231, Table 2 | |
| Calibration Item | Accuracy and condition | |
| Calibration Procedure | AASHTO M 231, Sec. 4.2 and 4.3 | |
| Calibration Interval | Not stated | |
|
|
| |
| Item | Buchner Funnel (Optional) | |
| Description | Glass funnel and filter paper subject to vacuum for recovering solids | |
| Calibration Item | See general statement above | |
| Calibration Procedure | ||
| Calibration Interval | ||
|
|
|