Equipment Checklist for
AASHTO T 21
Organic Impurities in Fine Aggregate for Concrete
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| 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. |
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| Item
| Glass Bottles
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| Description
| 12 or 16 ounce colorless glass
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| Calibration Item
| Volume and thickness of bottles, marks at 75, 130, and
200 ml
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| Calibration Procedure
| Check physical condition and accuracy of calibration marks
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| Calibration Interval
| 12 months
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| Reference color solution
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| Description
| Potassium dichromate & concentrated sulfuric acid
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| Calibration Item
| Verify correct solution
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| Calibration Procedure
| Visual
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| Calibration Interval
| 12 months
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| Item
| Sodium hydroxide solution
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| Description
| 7 ounces
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| Calibration Item
| Verify correct solution
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| Calibration Procedure
| Visual
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| Calibration Interval
| 12 months
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| Reference the following specifications
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| AASHTO
T 2
| Standard Practice for Sampling Aggregates
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| AASHTO
T 248
| Reducing Samples of Aggregate to Testing Size
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