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首页> 外文期刊>Earth Surface Processes and Landforms: The journal of the British Geomorphological Research Group >Impact of small amounts of swelling clays on the physical properties of debris-flow-like granular materials. Implications for the study of alpine debris flow
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Impact of small amounts of swelling clays on the physical properties of debris-flow-like granular materials. Implications for the study of alpine debris flow

机译：少量膨胀粘土对类似泥石流的颗粒状材料的物理性能的影响。对高山泥石流研究的启示

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The effect of the small fraction of clays on the rheological behaviour of alpine debris now is poorly understood. This is partly due to the complexity of the debris flow mineralogy and the broad particle size distribution. This study has investigated this issue by simulating an alpine debris flow with a mixture of well characterized fractions and then varying the clay fraction composition. Four samples were tested, ranging from a clay fraction made up of only kaolinite (1:1 type clay) to samples where 80 per cent of the kaolinite is replaced by bedeillite (a 2:1 type clay similar to smectite). Changing the content of 2:1 type clay has a strong influence on the behaviour of the whole material, despite its low weight fraction of around 2 per cent. The tests carried out on these reconstituted materials were compared with the results obtained for natural debris flow materials and showed some common trends: in particular, the rheological parameters for materials with and without 2:1 clays with respect to yield stress as a function of solid content. Copyright (c) 2006 John Wiley & Sons, Ltd.
机译：现在很少了解粘土对高山碎屑流变行为的影响。部分原因是泥石流矿物学的复杂性和广泛的粒径分布。这项研究通过模拟具有特征明确的馏分的混合物的高山泥石流，然后改变粘土馏分的组成，对这一问题进行了研究。测试了四个样品，从仅由高岭石组成的粘土级分（1：1型粘土）到其中80％的高岭石被地层沸石（类似于绿土的2：1型粘土）代替的样品。改变2：1型粘土的含量对整个材料的性能有很大的影响，尽管它的重量分数很低，约为2％。将对这些再生材料进行的测试与从天然泥石流材料获得的结果进行比较，并显示出一些共同的趋势：特别是，含和不含2：1粘土的材料的流变参数相对于固体的屈服应力内容。版权所有（c）2006 John Wiley＆Sons，Ltd.

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