水泥基材料微观分析模型颗粒与像素关系研究

发布时间：2018-08-01 16:06

【摘要】：水泥基材料水化全过程微观数值模拟是研究水泥基材料性能最先进的方法之一。在构建水泥颗粒模型过程中,颗粒与所包含像素的关系会影响模拟的合理性和精确性,并影响颗粒投放的精准度。根据不同的规则建立了不同的颗粒与包含像素的参数关系,与现有国外的一种参数关系进行对比验证。进一步研究了颗粒移动后颗粒与像素的关系,掌握了颗粒移动后对应的像素变化规律,通过移动较小粒径的颗粒实现"振捣"的效果,达到密实填充,为高密度颗粒模型的投放奠定基础。同时分析了数值模拟的计算误差,实际应用时要根据水泥颗粒级配的实际情况选取合适的精度。
[Abstract]:Microscopic numerical simulation of the whole hydration process of cement-based materials is one of the most advanced methods to study the properties of cement-based materials. In the process of constructing the cement particle model, the relationship between the particles and the pixels involved will affect the rationality and accuracy of the simulation and the precision of the particle delivery. According to the different rules, the relationship between the parameters of different particles and the pixels is established and compared with one of the existing overseas parameters. The relation between the particle and the pixel after the particle moving is further studied, and the change law of the pixel after the particle moves is grasped. The effect of "vibrating" is realized by moving the particle with the smaller particle size, and the density filling is achieved. It lays the foundation for the high density particle model. At the same time, the calculation error of numerical simulation is analyzed, and the appropriate precision should be selected according to the actual situation of cement particle gradation in practical application.
【作者单位】：中国矿业大学;江苏省建筑节能与建造技术协同创新中心;深部岩土力学与地下工程国家重点实验室;河海大学土木与交通学院;
【基金】：国家自然科学基金项目(51274192,51309090) 深部岩土力学与地下工程国家重点实验室开放基金(SKLGDUEK1414)
【分类号】：TU528

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