Geosynthetics can be exposed to varying temperature and moisture conditions when embedded in soil, which can affect their mechanical properties. However, existing testing standards do not account for extreme environmental conditions such as low temperatures and ice formation. The aim of this study was to understand the effect of temperature variation and ice formation on the tensile properties of dry and wet geosynthetics by conducting single-rib tensile tests on a wicking geogrid composite in a temperature chamber. Tensile stress–strain curves were obtained at various temperatures for dry samples (−40°C to 40°C) and wet samples (0°C to −40°C). It was found that, with a decrease in temperature, the tensile strength and stiffness of dry and wet samples increased while the ultimate strain decreased. The freezing of water in wet samples also accelerated the rates of increase in ultimate strength and decrease in ultimate strain. The failure mode of the geogrid composite also changed with temperature, occurring at the middle junction at higher temperatures and closer to the end junctions with a fibrous appearance at lower temperatures. These findings provide insights into the significance of varying environmental conditions on geosynthetic properties.

中文翻译：

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研究温度和水结冰对土工格栅复合材料响应的影响

土工合成材料嵌入土壤时可能会暴露在不同的温度和湿度条件下，这会影响其机械性能。然而，现有的测试标准并未考虑极端环境条件，例如低温和结冰。本研究的目的是通过在温度室中对芯吸土工格栅复合材料进行单肋拉伸试验，了解温度变化和结冰对干和湿土工合成材料拉伸性能的影响。在不同温度下获得干样品（-40°C 至 40°C）和湿样品（0°C 至 -40°C）的拉伸应力-应变曲线。研究发现，随着温度的降低，干湿样品的拉伸强度和刚度增加，而极限应变降低。湿样品中水的冻结也加速了极限强度的增加和极限应变的降低。土工格栅复合材料的失效模式也随着温度的变化而变化，在较高温度下发生在中间连接处，在较低温度下发生在靠近端部连接处的纤维状外观。这些发现为了解不同环境条件对土工合成材料性能的重要性提供了见解。