以两种细骨料（机制砂、天然砂）与两种粗骨料（石灰岩碎石、花岗岩碎石）分别组合配置的4组高强混凝土为研究对象，进行了混凝土徐变性能对比试验研究。分析了细骨料和粗骨料对高强混凝土徐变性能的影响规律，提出了徐变系数的预测计算公式。

Based on the comparatively experimental study on four groups of high-strength concretes made of different combinations of two fine aggregates (machine-made and natural sands) and two coarse aggregates (crushed limestone and granite), the effects of the fine and coarse aggregates on the creep of high-strength concrete are analyzed. The formula is proposed for predicting the creep-coefficients of high-strength concrete of different aggregates.