GCLs must be properly manufactured in a manner consistent with a minimum level of quality control as determined by in-house testing of the final product. This practice suggests the types of tests, the methods of the testing and the minimum testing frequencies.
It should be clearly recognized that manufacturers may perform additional tests or at greater frequency than required in this practice, or both. In this case, the manufacturer''s quality control plan will then take precedence over this practice. The quoted tests and test methods in Table 1 must appear in the QC plan and the QC report.
It should also be recognized that purchasers and installers of GCLs may require additional tests or at a great frequency than called for in this practice, or both. The organization(s) producing such project specific specification or quality assurance plan should recognize that such requirements are beyond the current state of the practice. If such a request is made by purchasers or installers, they should clearly communicate the requirements to the manufacturer or supplier during the contract decisions in order that disputes do not arise at a subsequent time.
TABLE 1 Minimum Types of Tests and Their Frequencies for the QC of GCLs
| Test Designation | Test Method | Frequency of Testing | Report Value |
|---|---|---|---|
| Clay:A | B | ||
| Free swell | D 5890 | One per truck or railcar but min, every 50 tonnes | Minimum average |
| Fluid loss | D 5891 | One per truck or railcar but min, every 50 tonnes | Minimum average |
| Geosynthetic Materials: | B | ||
| Geotextiles: | |||
| Mass per unit area | D 5261 | 20 000 m2 (200 000 ft2) | Typical and MARV |
| Grab tensile strength (MD and CD) | D 4632 | 20 000 m2 (200 000 ft2) | MARV |
| Geomembrane | |||
| Mass per unit area | D 5261 | 20 000 m2 (100 000 ft2) | Typical and MARV |
| Thickness | D 5199 | 20 000 m2 (200 000 ft2) | MARV |
| Tensile strength at break and yield (MD and CD) | D 638 | 20 000 ......
ASTM D5889-97(2008) history
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