Due to the environment-friendly properties of palm fiber, its use was attempted to improve the quality of soil together with lime. Unconfined compressive tests were carried out on soils mixed with palm fiber and lime under the three curing conditions of immersion in water, cyclic wetting–drying and air-curing for a series of contents of additives. The static stiffness of five types of samples (the number 1 type is the control sample) was also analyzed against curing conditions, curing time and sample type. Results from the tests show that the immersion in water condition is the best for the formation of unconfined compressive strength (UCS) and static stiffness, while the air-curing condition is the worst. The highest UCS can be acquired with 1% palm fiber and 20.7% lime, and the highest static stiffness was acquired with purely 20.7% lime content. The fastest increase rate is presented by the curing condition of immersion in water. The logarithmic function is more suitable for expressing the relationship between static stiffness and curing time. It is important for site engineers to understand the curing conditions and stabilizing mechanism of palm fiber and lime for the design and construction of civil engineering projects.

中文翻译：

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养护条件对棕榈纤维和石灰增强土壤性能的影响

由于棕榈纤维对环境友好，因此尝试使用棕榈纤维与石灰一起改善土壤质量。在以下三种固化条件下，对混合有棕榈纤维和石灰的土壤进行了无边限压缩试验：浸入水中，循环湿润-干燥和空气固化，以测定一系列添加剂的含量。还针对固化条件，固化时间和样品类型对五种样品（编号为1的样品）的静态刚度进行了分析。测试结果表明，浸入水中条件最适合形成无侧限抗压强度（UCS）和静态刚度，而空气固化条件最差。用1％的棕榈纤维和20.7％的石灰可以获得最高的UCS，而仅用20.7％的石灰含量可以获得最高的静态刚度。浸入水中的固化条件代表了最快的增长速度。对数函数更适合表示静态刚度和固化时间之间的关系。对于现场工程师来说，了解棕榈纤维和石灰的固化条件和稳定机理对于土木工程项目的设计和施工非常重要。