基于水泥水化过程的实验测量数据,建立了一个研究水泥水化过程的细观结构和有效性能演化的细观力学模型.该模型由未水化的水泥颗粒、水泥凝胶和孔洞三相介质组成,并假设细观结构呈周期性均匀分布.随着水化过程的进行,模型中的组份是连续变化的,并与实验测量的组份含量完全一致.利用本文中模型和均匀化方法(直接平均法和二尺度展开法)计算了水泥浆体在各瞬时的杨氏模量和泊松比.研究表明,在水泥的水化过程中,水泥浆体的弹性性能随水化度而变化,其变化规律和精度与现有的实验数据符合很好.该方法可容易地推广到三维情况和其他水化介质.
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