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Mechanical behaviour of a compacted well-graded granular material with and without cement

机译：有或没有水泥的压实的，均匀的压实颗粒材料的力学性能

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Cement additions improve the performance of granular soils. However, most literature examples of cement additions are in poorly graded sands, either to mimic the behaviour of sandstones or to accentuate the mechanical differences between cemented and uncemented soils. In this article, the behaviour of a well graded granular soil, used for base and sub-base of roads, was studied by doing triaxial tests on cemented and uncemented samples. Samples were compacted to achieve a dense fabric and tested at stresses commonly used in practice. Sieving was used to understand if breakage is important and to determine the grain size distributions of the samples after compaction and shearing. The results show that the addition of small percentages of cement greatly increase stiffness and dilation. Thereby, generating larger strengths; this is particularly important at low confining stresses in roads and parking areas, where this material is commonly used. At large strains, the results show that different Critical State Lines exist for both the uncemented and cemented soils. Each line has a different slope, which is believed to be the result of the evolution of the grain size distribution of the cemented soil. The normalised data indicate that a unique state boundary surface can be determined for all three tested soils. (C) 2019 Production and hosting by Elsevier B.V. on behalf of The Japanese Geotechnical Society.
机译：水泥添加剂可改善粒状土壤的性能。但是，大多数文献中添加水泥的例子都是在坡度较差的沙子中，以模仿砂岩的行为或强调胶结土和非胶结土之间的机械差异。在本文中，通过对胶结和非胶结样品进行三轴试验，研究了用于道路基础和次基础的坡度良好的粒状土的性能。压实样品以获得致密的织物，并在实践中通常使用的压力下进行测试。筛分用于了解破损是否重要，并确定压实和剪切后样品的晶粒尺寸分布。结果表明，少量水泥的添加大大增加了刚度和膨胀。从而产生更大的优势；这在通常使用这种材料的道路和停车区域的低围压下尤为重要。在大应变下，结果表明，未固结和固结土壤都存在不同的临界状态线。每条线具有不同的斜率，这被认为是胶结土壤粒度分布演变的结果。归一化数据表明可以为所有三种测试土壤确定唯一的状态边界面。 （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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