摘   要：研究了3种机制砂（S1、S2、S3）与河砂（HS）理化特性（吸水率、压碎指标、棱角性、岩性、化学组成、矿物组成）对混凝土性能的影响。结果表明：S1、S2中SiO2含量较高，属于偏硅质岩性的机制砂，S3中CaO含量相对较高，属于偏钙质岩性的机制砂；与HS相比，机制砂的吸水率较高，压碎指标较低，多棱角；S1、S2、S3混凝土的抗压强度优于HS混凝土，且机制砂的压碎指标越低，混凝土的抗压强度越高；由于机制砂颗粒棱角较多，且吸水率较高，机制砂混凝土的工作性和砂浆的流变性能相对较差；S3混凝土的工作性、抗压强度略优于S1、S2混凝土，但干燥收缩稍高于S1、S2混凝土。

Abstract: The influence of physicochemical properties(water absorption rate, crushing index, angularity, lithology, chemical composition, mineral composition) of 3 kinds of manufactured sands(S1、S2、S3) and river sand(HS) on the performance of concrete was studied. The results show that the SiO2 content in S1 and S2 is relatively high, belonging to the manufactured sand of siliceous rock type, while the CaO content in S3 is relatively high, belonging to the manufactured sand of calcareous rock type. Compared with HS, the water absorption rate of manufactured sand is higher, the crushing index is lower, and it has multiple edges and corners. The compressive strength of S1、S2、S3 concrete is better than that of HS concrete, and the lower the crushing index of manufactured sand, the higher the compressive strength of concrete. Due to the large number of sharp edges and high water absorption rate of manufactured sand particles, the workability of manufactured sand concrete and the rheological properties of mortar are poor. The workability and compressive strength of S3 concrete are slightly better than those of S1 and S2 concrete, while the drying shrinkage is slightly higher than that of S1 and S2 concrete.