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Role of particle characteristics in the compression behaviour of gap-graded sands

机译：颗粒特征在间隙梯度砂压缩行为中的作用

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The compression in gap-graded mixtures of sands with combined mineralogy has been investigated in recent research, focusing on the key factors that might imply the occurrence of convergent or non-convergent paths in compression (i. e., transitional or non-transitional behaviour). From previous work, the mineralogy of a matrix composed of larger grains seems to determine the possibility of the occurrence of transitional behaviour. Hence, if there is a strong and stiff matrix made of quartz sand particles, which are either larger than or at least of similar size to the other component, then non-convergent compression paths (i.e., transitional behaviour) are likely to occur. As a further confirmation of this hypothesis, this technical note presents the results of oedometer tests on the same range of mixtures of a quartz sand and a carbonate sand as was used in previously published work, but with the larger component being of the stiffer and stronger quartz sand. In agreement with the hypothesis, transitional behaviour occurred. (C) 2019 Production and hosting by Elsevier B.V. on behalf of The Japanese Geotechnical Society.
机译：在最近的研究中，已经研究了间隙梯度砂与组合矿物学的混合物的压缩，其重点是可能暗示压缩中会出现收敛或非收敛路径的关键因素（即过渡或非过渡行为）。从以前的工作来看，由较大晶粒组成的基质的矿物学似乎决定了过渡行为发生的可能性。因此，如果存在由石英砂颗粒制成的坚固且坚硬的基质，该基质大于或至少具有与其他组分相似的尺寸，则可能会出现非会聚的压缩路径（即过渡行为）。作为对该假设的进一步证实，本技术说明介绍了与以前发表的工作中使用的相同范围的石英砂和碳酸盐砂混合物的里程表测试结果，但较大的成分具有更强的硬度石英砂。与该假设一致，发生了过渡行为。 （C）2019年由Elsevier B.V.代表日本岩土工程学会制作和主持。

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