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应用细观力学理论及三维微观水化模型,建立了水泥浆体的理想化细观力学模型.在该模型中:首先将水泥浆体中包裹着水化产物的未水化水泥颗粒视为第1层次的等效介质,利用双层夹杂自洽理论求出弹性性质;再将含水的孔洞视为嵌入在第1层次等效介质中的夹杂,利用自洽理论给出水泥浆体的最终弹性性质;最后分析了水泥浆体在不同水灰比情况下弹性性质随水化程度的演化进程.试验结果证明该模型可以较好地预测水泥浆体的弹性力学性质.
An idealized meso-mechanics model of cement paste is established by using micromechanics theory and three-dimensional microscopic hydration model. In this model, the unhydrated cement particles that enclose hydration products in cement paste are taken as the first 1 level of equivalent medium, the self-consistent theory of double inclusions is used to calculate the elastic properties. The water-filled holes are regarded as inclusions embedded in the first level of equivalent medium. The final elastic properties of the cement slurry are given by the self-consistent theory Finally, the evolution of elastic properties along with the degree of hydration of cement paste at different water-cement ratios was analyzed. The experimental results show that the model can predict the elastic properties of cement paste well.