海砂与河砂、尾砂作为建筑用砂的比较研究  

Comparative study of sea sand,river sand and tailing sand which using as building sand

作　　者：尹飞龙[1,2] 欧阳东[1,2] 温喜廉a 黄华县[1,2] 

机构地区：[1]暨南大学理工学院"重大工程灾害与控制"教育部重点实验室 [2]暨南大学工程材料与结构耐久性研究中心,广东广州510632

出　　处：《混凝土》2011年第12期73-75,78,共4页Concrete

摘　　要：研究了海砂、河砂及尾砂的物理性质、颗粒形貌、水泥胶砂性能和混凝土性能,并对它们作为建筑用砂作了系统的对比分析。结果显示海砂颗粒级配与河砂相似,级配较好;棱角性略大于河砂,小于尾砂和机制砂;坚固性比河砂和尾砂差;氯离子含量较高。海砂和河砂颗粒圆滑、棱角少,机制砂颗粒粗糙、棱角多,尾砂介于天然砂与机制砂之中。河砂的水泥胶砂性能与标准砂接近,海砂的抗折强度与抗压强度较河砂稍低,差别不大。混凝土各龄期抗压强度中尾砂最大,河砂和海砂差别不大,这与集料的圆度大小顺序一致。This study make a comparative study of sea sand,river sand and tailing sand which using as building sand on physical properties, particle morphology,performance of cement mortar and concrete.The results showed that sea sand has a similar particle size distribution to river sand, bigger edges and corners than river sand, less than river sand in soundness ,higher levels of chloride ions. Sea sand and river sand particles is sleek, less angular, crushed sand particles is rough and more edges and corners, and tailing sand is in the middle of natural sand and crushed sand. River sand had a similar performance of cement mortar with standard sand, river sand had almost the same flexural strength and compressive strength with tailing sand.Tailing sand had the highest compressive strength of concrete in different ages, river sand and sea sand had almost the same, which had the same order with roundness.

关 键 词：海砂 建筑用砂 物理性质 颗粒形貌 性能 

分 类 号：TU528.041[建筑科学—建筑技术科学]