Abstract Soil stabilization is a well-known methods for the treatment problematic soils. Its advantages over soil replacement include low cost and fast implementation. The alkaline activation of soft soils is a new technique that has been proposed recently to stabilize soft soils. However, its strengthening mechanism and the final product in terms of stiffness and brittleness resemble those observed in cemented soils. In other words, the residual strength which emerges when approaching failure is very low, and this results in immediate damage to building structures. These shortcomings need to be overcome, particularly in places where seismic loading can be expected. In the case of cemented columns under heavy embankments, horizontal displacement is likely to occur under seismic loading. This will result in the failure of stabilized material due to frail bending moments, making greater residual strengths more important than higher peak strengths. To address this problem, a fix fly ash content of 40% and polypropylene fibers in the range of 0.5%, 0.75%, 1%, and 1.25% were considered. Compressive, flexural and indirect tensile strength test results revealed the feasibility of polypropylene fibers to improve post-peak behavior, thus allowing for higher residual strength after failure.

中文翻译：

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将复丝聚丙烯纤维掺入碱性活性粉煤灰土壤混合物中的效果

摘要 土壤稳定是一种众所周知的处理问题土壤的方法。它相对于土壤置换的优势包括成本低和实施速度快。软土碱活化是最近提出的一种稳定软土的新技术。然而，它的强化机制和最终产品的刚度和脆性与在胶结土中观察到的相似。换句话说，接近破坏时出现的残余强度非常低，这会导致建筑结构立即损坏。这些缺点需要克服，特别是在可以预期地震载荷的地方。对于重型路堤下的水泥柱，在地震荷载作用下很可能发生水平位移。由于脆弱的弯矩，这将导致稳定材料的失效，使得更大的残余强度比更高的峰值强度更重要。为了解决这个问题，考虑了 40% 的固定粉煤灰含量和 0.5%、0.75%、1% 和 1.25% 范围内的聚丙烯纤维。压缩、弯曲和间接拉伸强度测试结果揭示了聚丙烯纤维改善峰值后行为的可行性，从而允许更高的失效后残余强度。