There are many studies related to using alkali activated binders for the improvement of clayey soil mechanical properties. In this study, alkali activated slag (AAS) for the improvement of clayey soil strength was used and it reinforced the clay. This paper presents results of an investigation on the utilization of ground-granulated blast-furnace slag in the reinforcement of clay soils. Therefore, significant cost savings couldbe achieved by using alkali activated slag as binding material. These samples were analyzed by X-Ray fluorescence analysis (XRF), X-Ray diffraction (XRD), scanning electron microscopy (SEM) and strength tests after the curing. The clay samples reinforced with AAS showed higher shear stress, cohesion and internal friction angle compared with the samples without reinforcement. The highest shear strength was achieved by using the highest amount of AAS (30%). This shear stress of the unreinforced clay samples could be increased from 63.2 to 137.4 kPa (117.4%) and from 123.2 to 257.4 kPa (108.9%) when the normal stress value of 100 and 500 kPa was used, respectively. The increase in shear strength is closely related to the compact contact zone between AAS and clay. Moreover, the new formed cementitious compounds of AAS had a positive influence on the shear strength of samples as well.

中文翻译：

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碱活化矿渣补强剂改善黏土强度

有许多研究涉及使用碱活化的粘合剂来改善粘性土壤的机械性能。在这项研究中，使用碱活化矿渣（AAS）来提高粘土的土壤强度，并增强了粘土。本文介绍了利用粉状高炉矿渣来增强粘土的研究成果。因此，通过使用碱活化炉渣作为粘结材料，可以节省大量成本。固化后，通过X射线荧光分析（XRF），X射线衍射（XRD），扫描电子显微镜（SEM）和强度测试对这些样品进行分析。与未加筋的试样相比，用AAS补强的粘土试样具有更高的剪切应力，内聚力和内摩擦角。通过使用最高量的AAS（30％），可以获得最高的剪切强度。当分别使用法向应力值100和500 kPa时，未增强黏土样品的剪应力可以从63.2增加到137.4 kPa（117.4％），从123.2增加到257.4 kPa（108.9％）。剪切强度的增加与AAS和粘土之间的紧密接触区密切相关。此外，新形成的AAS胶结化合物对样品的剪切强度也有积极的影响。