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GSI's new GCL test method
| 题名： | GSI's new GCL test method |
| 正文语种： | eng |
| 作者： | George R. Koerner |
| 作者单位： | Geosynthetic Institute in Folsom Pa |
| 摘要： | The Geosynthetic Institute (GSI) has a new standard test method for "Determination of the Polymer Loading in Geosynthetic Clay Liners (GCLs)." It was developed over several years without consensus of the membership. GSI forged ahead with it because we see many such products in the market and believe there is a need to start the standardization process to provide some means of quantitative assessment of these products. This test method covers the measurement for loss of ignition (LOI) of GCL infills to determine the polymer loading. The method also covers the measurement of moisture content and ash content, which are required for the calculation of LOI by default. It should be noted that the techniques described within the standard are only two of 13 methods that Schumacher (2002) suggests for the determination of total organic carbon (TOC) in soils. The methods described have been shown to accurately identify the amount of polymer added to a GCL infill regardless of formulation. Gustitus et al. (2020) and Scalia et al. (2014) have identified many different types of polymers currently used to enhance bentonite performance in GCLs. It is freely acknowledged that these methods do not address the nature of the polymer, consideration of polymer durability, effectiveness in reducing hydraulic conductivity long-term, polymer distribution within the GCL infill and the potential for washout. But it is a first step. |
| 出版年： | 2021 |
| 期刊名称： | Geosynthetics |
| 卷： | 39 |
| 期： | 4 |
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