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首页> 外文会议>International symposium on deformation characteristics of geomaterials;IS-Seoul 2011 >The influence of cementation in the critical state behaviour of artificial bonded soils
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The influence of cementation in the critical state behaviour of artificial bonded soils

机译：胶结作用对人工粘结土临界状态行为的影响

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Cemented soils are often seen as problematic materials, since they don't lit into the usual behaviour of transported soils. The accumulated experience in saprolitic residual soils of Portuguese granitic formations (Viana da Fonseca, 1988, 1996, in silty sands, and Rodrigues, 2003, in coarser granular soils) have pointed out to the possibility of working a critical state framework, aiming to define adequate models to characterize these naturally cemented soils. More recently, integrated in a PhD program (Cruz, 2010), a specific study on the applicability of critical state approach to artificially cemented soils, remoulded from the same coarse granitic soils studied by Rodrigues, was pursued. This involved an extensive laboratorial testing program performed over these mixtures with distinct cement contents. Overall, 40 unconfined, diametral and triaxial (CID) comprcssive tests were executed in samples mixed with different types of cement and percentages. The obtained results revealed the presence of different critical state lines (CSL) varying with cement content, suggesting a significant complexity to predict the ultimate state, as well as distinct behaviours for uncemented and cemented materials.
机译：胶结土壤通常被视为有问题的材料，因为它们不会影响运输土壤的通常行为。葡萄牙花岗岩地层的腐殖质残余土壤中的累积经验（Viana da Fonseca，1988，1996，粉质砂土; Rodrigues，2003，在较粗的粒状土壤中）指出了建立临界状态框架的可能性，目的在于确定适当的模型来表征这些天然胶结的土壤。最近，在一项博士学位计划（Cruz，2010年）中，进行了一项针对临界状态方法在人工胶结土壤上的适用性的具体研究，该方法是从Rodrigues研究的相同粗粒花岗岩中重塑而成的。这涉及对水泥含量不同的这些混合物进行广泛的实验室测试程序。总体而言，在混合了不同类型水泥和百分比的样品中进行了40次无限制，径向和三轴（CID）强制性测试。获得的结果表明，存在不同的临界状态线（CSL），其随水泥含量的变化而变化，这表明预测最终状态以及非水泥和胶结材料的独特行为具有极大的复杂性。

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