Lean cemented sand and gravel (LCSG) materials are increasingly being used in dams, embankments, and other civil engineering applications. Therefore, their mechanical properties and stress-strain behavior should be systematically understood. In this study, the small-strain dynamic properties of LCSG materials were examined. A series of dynamic triaxial tests were performed to investigate the effects of the confining pressure and cementing agent content of the material on its dynamic shear modulus (G_d) and damping ratio (λ). The results show that G_d increased and λ decreased with increasing confining pressure and cementing agent content; however, under the same confining pressure and cementing agent content, G_d decreased gradually in accordance with shear strain. Furthermore, new expressions were derived for G_d and λ, as well as for their maxima. The results of this study could provide a reference for practical engineering applications, including the construction of dams using LCSG materials.

中文翻译：

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不同固井剂含量下稀水泥砂砾材料的小应变动力特性

稀薄的水泥砂和砾石（LCSG）材料正越来越多地用于水坝，路堤和其他土木工程应用中。因此，应系统地了解它们的机械性能和应力应变行为。在这项研究中，研究了LCSG材料的小应变动态特性。进行了一系列动态三轴试验，以研究材料的围压和胶结剂含量对其动态剪切模量（G _d）和阻尼比（λ）的影响。结果表明：g ^ _d增加，λ随围压和固井剂含量降低; 但是，在相同的围压和固结剂含量下，G _d随剪切应变而逐渐降低。此外，还针对G _d和λ及其最大值导出了新的表达式。这项研究的结果可以为实际工程应用提供参考，包括使用LCSG材料建造大坝。