中文摘要：

随着机制砂混凝土在土木工程中的推广与应用，对其收缩、徐变性能进行全面系统的研究已成为工程中的必需。对石灰岩质机制砂}昆凝土与普通砂混凝土进行标准收缩徐变试验，对比分析石灰岩质机制砂混凝土的收缩徐变特性，并利用试验数据对常用的普通砂混凝土收缩徐变的计算模型进行修正，得到石灰岩质机制砂混凝土的收缩徐变的计算公式。试验与分析结果表明：石灰岩质机制砂混凝土的收缩徐变发展规律与普通混凝土类似，但实测收缩值比普通砂混凝土略高，徐变系数值则大大高于普通砂混凝土；CEB．FIP90模型、AC1209模型与B3模型对石灰岩质机制砂混凝土收缩徐变的计算结果表明，三个模型均高估了石灰岩质机制砂的收缩变形值；除ACl209模型的徐变计算结果与徐变实测值吻合好外，其余两个模型均高估了石灰岩质机制砂的徐变变形；最后，以ACl209模型为基础，根据标准试件的实测结果对ACl209的收缩、徐变模型进行修正，并得出石灰岩质机制砂混凝土的收缩徐变的计算公式。

英文摘要：

With the increase of application of crushed limestone sand （CLS） concrete in civil structures, a systematic study of its shrinkage and creep behavior is highly demanded. Creep and shrinkage tests on CLS concrete specimens and normal sand concrete specimens were conducted. Results show that the creep and shrinkage development laws of CLS concrete are similar to those of normal concrete, while the measured shrinkage strains of CLS concrete are larger than those of normal concrete, and in addition the measured creep coefficients of the former are significantly larger than those of the later. CEB-FIP 90, ACI 209, and B3 models for CLS concrete are studied. Calculation results show that all three models overestimate the shrinkage strain of CLS concrete, and although the other two models may overestimate the creep coefficients, those coefficients predicted by ACI 209 model are in good agreement with the measured results. Furthermore, the creep and shrinkage calculation formulas for CLS concrete are derived based on the modified predictions of ACI 209 model.