Line 6: |
Line 6: |
|
| |
|
| A simple jar test can be used to gauge the proportion of fines in an aggregate product before acceptance. | | A simple jar test can be used to gauge the proportion of fines in an aggregate product before acceptance. |
| | |
| Apparatus: | | Apparatus: |
| *A large wide-mouthed jar - glass or clear plastic are both fine. | | *A large wide-mouthed jar - glass or clear plastic are both fine, |
| *Tap water, and | | *Tap water, and |
| *The aggregate to be tested. | | *The aggregate to be tested. |
| | |
| Method: | | Method: |
| # Collect approximately 5 cm of material in the jar (or at least two complete layers of 40 mm clear stone), | | # Collect approximately 5 cm of material in the jar (or at least two complete layers of 50 mm clear stone), |
| # Add water to around 3/4 full, | | # Add water to around 3/4 full, |
| # Secure cap and shake, | | # Secure cap and shake, |
| # Leave for at least 30 minutes and until the water is clear - plan to run the test overnight when possible, | | # Leave for at least 30 minutes and until the water is clear - plan to run the test overnight when possible, |
| # Examine the layer of sediment - if > 3 mm has been washed from 5 cm of product, reject the material, | | # Examine the layer of sediment - if > 3 mm has been washed from 5 cm of product, the material should be rejected, |
| Note that the sediment may collect on top of, or at the bottom of the construction material. | | Note that the sediment may collect on top of, or at the bottom of the construction material. |
|
| |
|