Sulfate-rich dispersive soils are a major concern due to their high susceptibility to erosion and heave, related to high amounts of adsorbed Na⁺ ions and the formation of expansive minerals derived from reactions involving sulfates and calcium, respectively. In this sense, the development of alternative treatments to overcome such problems must be sought, since the application of lime and/or Portland cement by themselves has proven to be ineffective. Thus, the present paper proposes a binder composed of carbide lime and ground glass waste combined with fiberglass reinforcement to stabilize such soils. The efficiency of the proposed alternative towards reduction of swelling was assessed through 3-D volumetric swell tests carried out on compacted soil-binder-fiberglass blends molded with multiple different dosages. The results have shown that the porosity and the amount of carbide lime influenced the volumetric strain (ε_v) of the tested specimens greatly. The influence of porosity was inversely proportional, while the influence of the amount of carbide lime was directly proportional. The addition of fiberglass was shown to be ineffective. Thus, the ε_v was successfully correlated to the adjusted porosity/lime index (η/L_iv), proving the innovative character of the approach applied herein and enabling the prediction of the ε_v for different dosage options.

中文翻译：

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绿色稳定纤维增强富硫酸盐分散土的膨胀预测

富含硫酸盐的分散性土壤是一个主要问题，因为它们对侵蚀和隆起的敏感性很高，与大量吸附的 Na ^{+ 相关}离子和膨胀矿物的形成分别来自硫酸盐和钙的反应。从这个意义上说，必须寻求开发替代处理方法来克服这些问题，因为石灰和/或波特兰水泥的应用本身已被证明是无效的。因此，本文提出了一种由碳化石灰和磨碎玻璃废料与玻璃纤维增​​强材料组成的粘合剂，以稳定此类土壤。通过对压实的土壤-粘合剂-玻璃纤维混合物进行 3-D 体积膨胀测试，以多种不同剂量模制而成，评估了所提出的减少膨胀替代方案的效率。结果表明，孔隙率和电石石灰的量影响了体积应变（ε _v) 的测试样本。孔隙度的影响成反比，而电石石灰用量的影响成正比。添加玻璃纤维被证明是无效的。因此，ε _v成功地与调整后的孔隙度/石灰指数 ( η / L _iv ) 相关联，证明了本文应用的方法的创新特性，并能够预测不同剂量选项的ε _v。