Long-Term Performance of GCLs Permeated with Aqueous Inorganic Solutions

[摘要][9820863]“无机水溶液渗透gcl的长期性能”，Shackelford, charles，科罗拉多州立大学，无机水溶液渗透gcl的长期性能土工合成粘土衬垫（gcl）是工厂制造的液压屏障，由一层薄薄的膨润土（~ 5.0 kg/m2）夹在两层土工布之间或粘合在土工膜上。自1992年以来，由于其相对较低的成本和非常低的水导率（k 10E-8 cm/s）， gcl已广泛用于液压密封应用。然而，使用gcl的大多数应用都涉及到化学溶液的密封，这些化学溶液可能与gcl的膨润土部分不相容，而且大多数gcl的水力导电性测试的结果都是在相对较短的测试时间内进行的（例如，6个月）。因此，这项由科罗拉多州立大学（CSU）和威斯康辛大学麦迪逊分校（UWM）共同开展的研究的主要目的是评估土工合成粘土衬垫（gcl）在无机水溶液中渗透的长期性能，测试时间从6个月到6个月。到3年。将测定gcls暴露于蒸馏水和盐溶液渗透前后的物理、水力和机械性能。该研究将包括评估gcl的长期水力导电性、膨胀性、抗剪强度和扩散特性的测试。此外，CSU和uwm之间将建立一个基于教育和研究传播目的的交流计划。本研究的结果将促进我们对gcl长期行为的理解，并应影响涉及gcl的废物收容系统的设计。

Abstract9820863"Long-term Performance of GCLs: Permeated with Aqueous Inorganic Solutions"Shackelford, CharlesColorado State UniversityLong-Term Performance of GCLs Permeated with Aqueous Inorganic SolutionsGeosynthetic clay liners (GCLs) are factory-manufactured hydraulic barriersconsisting of a thin layer of bentonite (~ 5.0 kg/m2) sandwiched betweentwo geotextiles or bonded to a geomembrane. Since 1992, GCLs have been usedwidely in hydraulic containment applications because of their relativelylow cost and very low hydraulic conductivity to water (k 10E-8 cm/s).However, most applications using GCLs involve the containment of chemicalsolutions that may be incompatible with the bentonite portion of the GCLs,and the results of most hydraulic conductivity tests on GCLs are performedover relatively short test durations (e.g., 6 mos.). As a result, theprimary objective of this study, a joint effort between Colorado StateUniversity (CSU) and the University of Wisconsin at Madison (UWM), is toevaluate the long-term performance of geosynthetic clay liners (GCLs)permeated with aqueous inorganic solutions over test durations ranging from6 mos. to 3 yrs. Physical, hydraulic, and mechanical properties of the GCLsboth before and after exposure to permeation with distilled water and saltsolutions will be determined. The research will include tests to evaluatethe long-term hydraulic conductivity, swell, shear strength, and diffusionproperties of GCLs. In addition, an exchange program between CSU and UWMwill be established based for both educational and research disseminationpurposes. The results of this study will advance our understanding of thelong-term behavior of GCLs, and should impact the design of wastecontainment systems involving GCLs.