基于参数敏感性的自密实混凝土徐变模型

Creep mathematical model of self-compacting concrete based on parameter sensitivity

由于配合比的特殊性,自密实混凝土的徐变性能与普通混凝土存在差异。本研究对自密实混凝土多参数进行徐变试验,分析胶骨比、水胶比、砂率和粉煤灰掺量4个参数的敏感性,建立自密实混凝土双曲线徐变模型,应用于自密实混凝土长期变形的预测。

Due to the particularity of its mix proportion,creep performance of SCC is different from that of ordinary concrete.Based on the creep experimental data considering the influence of multiple parameters,the sensitivities of four main parameters,i.e.,binder-aggregate ratio,water-binder ratio,sand ratio and fly ash content,were analyzed.The mathematical model of hyperbolic function of SCC creep is established and is used to predict the long-term deformation of SCC.