Microstructure of Omani expansive soils
Microstructure of Omani expansive soils
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DOI：
10.1139/cgj-36-2-272
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发表时间：
1999-04-01
影响因子：
3.6
通讯作者：
McGown, A
中科院分区：
文献类型：
--
作者：
Al-Rawas, AA;McGown, A
控制阿曼土壤膨胀性的基本因素是其在地质、矿物学、工程和微观结构方面的特征。前三个因素已被广泛研究，然而，第四个尚未得到充分的调查，没有工作已经发表在这方面。因此，本文对这些土的微观结构特征进行了研究。扫描电子显微镜在这项调查中使用。对从已知膨胀土问题的不同地点（AI-Khod、Al-Murtafa 'a和Duqm）选出的三个样品进行了研究。对每个样品的两个样品（代表垂直和水平平面）进行了测试。此外，对两个经受溶胀的样品进行测试，以研究溶胀引起的微织物变化。阿曼膨胀土研究的织物一般由致密的粘土基质，虽然偶尔观察到粘土颗粒基质。此外，没有观察到连接器，只看到少数聚合。孔隙空间类型以组合内型和元素内型为主。显著的微织物变化引起的溶胀。
The fundamental factors controlling the expansive nature of Omani soils are their characteristics with respect to geology, mineralogy, engineering, and microstructure. The first three factors have been extensively studied, however, the fourth has not yet been fully investigated and no work has been published on this aspect. Therefore, this paper deals with the microstructure characteristics of these soils. The scanning electron microscope was employed in this investigation.. Three samples selected from different sites where expansive soils problems were known (AI-Khod, Al-Murtafa'a, and Duqm) were investigated Two specimens from each sample, representing the vertical and horizontal planes, were tested. In addition, two samples that were subjected to swelling were tested to investigate the microfabric changes caused by swelling. The fabric of the Omani expansive soils studied generally consists of dense clay matrices, although clay-granular matrices are occasionally observed. In addition, no connectors have been observed and only few aggregations have been seen. Pore spaces are mainly of the intra-assemblage and intra-elemental types. Significant microfabric changes were induced by swelling.