中文摘要：

研究了砂灰比对石灰岩机制砂砂浆干缩率、不同类型砂对砂浆干缩率、不同石粉含量对砂浆干缩率的影响。结果表明，随着砂灰比的减小，即水泥浆量的增加，干缩率呈增大的趋势；但在水泥浆未填充满砂子空隙之前，随着水泥浆的增加，干缩率的增幅很小，当填充满之后继续增加，增幅明显变大。在早期（≤7d），石灰岩机制砂砂浆的干缩率大于花岗岩和石英岩机制砂，在后期（〉7d），花岗岩和石英岩机制砂砂浆的干缩率大于石灰岩机制砂；在各个龄期，3种机制砂砂浆的干缩率均大于河砂的。随着石粉含量的增大，机制砂砂浆的收缩率先减小后增大。在早期（1d、3d），石粉含量为10％时砂浆干缩率最小；在后期（≥7d），石粉含量为15％时砂浆干缩率最小。

英文摘要：

Influence of sand-cement ratio on drying shrinkage of mortar with limestone manufactured sand was researched. And the effects of lithologie characters of manufactured sand and the limestone powder content on drying shrinkage of mortars were also studied. The experimental results show that the drying shrinkage of mortar increases with the decrease of sand-cement ratio. The drying shrinkage of mortar increases tiny before the void of sand is mixed fully, and then its drying shrinkage will increase quickly. Drying shrinkage of mortar with limestone manufactured sand is bigger than mortars with granitic and quartzite manufactured sands at early stage（≤7d）, and they are reverse after 7d. And drying shrinkage of mortar with manufactured sands is all bigger than that of mortar with river sand. With the increase of limestone powder content, drying shrinkage of mortar with limestone manufactured sand increases firstly, and then decreases. When the curing age is less than 3 days, the drying shrinkage of mortar with 10% limestone powder is the least. And the curing age is longer than 7 days, the drying shrinkage of mortar with 15% limestone powder is the least.