Abstract The interaction of marly soils and buildings in the town of N'Gaous has led to the appearance of deformations and disturbances that have affected many constructions due to the swelling of the underlying soil. In addition, when these soils are used as construction material, embankments, they are extremely problematic. In this article, three sets of samples, from three different locations, were sampled. Their average carbonate content varies from 14% to 33%.The mineralogical and microsctructural characteristics of these soils are studied by X-ray diffraction (XRD), TG/DTA and SEM analysis. These are mainly smectite clays containing kaolinite and other minor constituents. They all have similar structure, laminar texture with an arrangement of clay particles oriented parallel to the bedding and pores of varying size. These soils are very plastic and have a plasticity index ranging from 41.5 to 54.3%. It was found that the swelling pressure before any treatment ranged from 2.3 to 2.7 bars, after treatment the swelling pressure becomes stable with 5% lime, this behavior has a link with the formation of a cementitious phase of calcium silicate hydrate (CSH) type, as revealed by XRD, ATD/TG and analysis and SEM. In terms of results, it was found that the addition of quicklime has clearly reduced the swelling of the tested samples. It was also found that the presence of carbonates with the above mentioned contents in the studied samples (

中文翻译：

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阿尔及利亚东北部 N'Gaous 膨胀泥灰岩的膨胀特性和石灰稳定性

摘要 N'Gaous 镇泥质土壤和建筑物的相互作用导致了变形和扰动的出现，由于下伏土壤的膨胀影响了许多建筑。此外，当这些土壤用作建筑材料、堤防时，它们是非常成问题的。在本文中，对来自三个不同位置的三组样本进行了采样。它们的平均碳酸盐含量从 14% 到 33% 不等。通过 X 射线衍射 (XRD)、TG/DTA 和 SEM 分析研究了这些土壤的矿物学和微观结构特征。这些主要是含有高岭石和其他次要成分的绿土粘土。它们都具有相似的结构、层状质地，粘土颗粒排列平行于层理和不同大小的孔隙。这些土壤的塑性很强，塑性指数在 41.5% 到 54.3% 之间。发现任何处理前的溶胀压力范围为 2.3 到 2.7 巴，处理后溶胀压力在 5% 石灰下变得稳定，这种行为与水化硅酸钙 (CSH) 型胶凝相的形成有关， XRD、ATD/TG 和分析以及 SEM 表明。结果方面，发现加入生石灰明显降低了测试样品的溶胀。还发现在研究样品中存在具有上述含量的碳酸盐（正如 XRD、ATD/TG 和分析以及 SEM 所揭示的那样，这种行为与水化硅酸钙 (CSH) 型胶结相的形成有关。结果表明，生石灰的加入明显降低了受试样品的溶胀。还发现在研究样品中存在具有上述含量的碳酸盐（正如 XRD、ATD/TG 和分析以及 SEM 所揭示的那样，这种行为与水化硅酸钙 (CSH) 型胶结相的形成有关。结果方面，发现加入生石灰明显降低了测试样品的溶胀。还发现在研究样品中存在具有上述含量的碳酸盐（