Humidity, air temperature, rainfall and solar radiation all contribute to the weathering of geosynthetics. Over time, their useful life can be affected and changes in properties can be observed, which affects the performance of these materials. As geosynthetics durability analyses must encompass each work condition, assessing the climate effects is essential for design purposes. This study exposed a nonwoven needle-punched poly(ethylene) terephthalate geotextile to natural weathering in three Brazilian cities (different exogenous environments) for 18 months. Mechanical tests were conducted to evaluate the geotextile changes due to weathering. This was demonstrated by the results: exposure to weather leads to the deterioration of the geotextile mechanical properties and increased stiffness. After four months, the tensile strength fell by half, while the deformation needed more than 12 months to have this same reduction; ultraviolet radiation intensity was the most effective weathering condition in the field; humidity and rainfall can affect the stiffness of geotextiles; the impact of accumulated climate factors gradually showed a convergence in the response of geotextile to weathering. Thus, this work highlights the need to evaluate the climate conditions in each location to understand the material's behavior on the exposure time.

中文翻译：

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非织造土工布暴露于不同气候条件下的自然风化效应

湿度、气温、降雨量和太阳辐射都会导致土工合成材料的风化。随着时间的推移，它们的使用寿命可能会受到影响，并且可以观察到性能的变化，从而影响这些材料的性能。由于土工合成材料的耐久性分析必须涵盖每种工作条件，因此评估气候影响对于设计目的至关重要。这项研究将非织造针刺聚对苯二甲酸乙二醇酯土工布在巴西三个城市（不同的外源环境）中暴露于自然风化下 18 个月。进行机械测试以评估土工织物因风化而发生的变化。结果证明了这一点：暴露在天气条件下会导致土工织物机械性能恶化并增加刚度。 4 个月后，抗拉强度下降了一半，而变形需要 12 个月以上才能达到同样的下降；紫外辐射强度是野外最有效的风化条件；湿度和降雨量会影响土工布的挺度；累积的气候因素的影响逐渐表现出土工织物对风化的响应趋同。因此，这项工作强调需要评估每个地点的气候条件，以了解材料在暴露时间上的行为。