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首页> 外文会议>GeoShanghai International Conference; 20060606-08; Shanghai(CN) >Index Properties of Soils Rich in Iron Oxides
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Index Properties of Soils Rich in Iron Oxides

机译：富含氧化铁的土壤的指数特性

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摘要

Iron oxides are known to have cementation and aggregation behaviours in soil. They are present as very fine particles between 20 nm to 100 nm at various levels of concentration in natural soils and rocks. This paper describes an experimental programme conducted to examine the index properties of iron oxides rich soils, which are affected by iron oxides aggregation, cementation, and magnetic properties. In addition, the effects of curing and different measuring devices (e.g. Casagrande cup and fall cone) are discussed. The soil samples for the above experimental work were prepared from synthetic powders such as speswhite kaolin, bentonite, keuper marl, and iron oxides (e.g. haematite and goethite) and were tested in various proportions. The results show the Casagrande cup underestimates liquid limit compared to fall cone, whereas the magnetic property of iron oxides has minor effect on different cone materials (e.g. stainless steel, brass, aluminium, and acrylic). The liquid limits of the curing samples are decreased significantly due to the growth of iron oxides cementation and aggregation in soil. Besides, there are some differences between the coefficient of the regression line and the flow lines generalisation for soils with and without iron oxides.
机译：已知氧化铁在土壤中具有胶结和聚集行为。它们在天然土壤和岩石中以各种浓度的浓度存在于20 nm至100 nm之间的非常细的颗粒中。本文介绍了一个实验程序，用于检查富含铁氧化物的土壤的指数特性，这些土壤受铁氧化物的聚集，胶结和磁性影响。此外，还讨论了固化效果和不同的测量设备（例如Casagrande杯和落锥）。用于上述实验工作的土壤样品是由合成粉末制成的，例如粉煤灰，膨润土，褐煤粉和氧化铁（例如赤铁矿和针铁矿），并以各种比例进行了测试。结果表明，与降锥相比，卡萨格兰德杯低估了液体极限，而氧化铁的磁性对不同的锥材料（例如不锈钢，黄铜，铝和丙烯酸）的影响较小。由于铁氧化物在土壤中的胶结和聚集的增长，固化样品的液体极限显着降低。此外，对于有或没有氧化铁的土壤，回归线的系数与流线的概括之间也存在一些差异。

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