【摘要】 采用区组完全试验设计,研究了水灰比和水泥用量对混凝土耐久性能——氯离子在混凝土中的扩散系数的影响作用。根据硝酸银化学滴定法测量得到的氯离子含量分布,拟合回归出自由氯离子初始扩散系数(D0)的预测模型,该模型可用于预测考虑水灰比和水泥用量综合影响作用的自由氯离子初始扩散系数,同时试验验证了回归方程的适用性。更多还原

【Abstract】 Influences of water to cement ratio(w/c) and cement content on concrete durability are analyzed in detail based on experimental results.An initial chloride effective diffusion coefficient predicting model is proposed according to nonlinear least square method regression.This model can be used to evaluate the initial chloride effective diffusion coefficient which takes combination influences of w/c and cement content into consideration.At last,relevant validation experiments are executed to test the regression model.更多还原