石碴对水泥基材料性能影响研究  

Properties Effecting Research of Crushed Sand on Cementitious Materials

作　　者：李清海[1] 王菲菲[1] 李清原[1] 周胜男[1] 

机构地区：[1]中国建筑材料科学研究总院绿色建筑材料国家重点试验室,北京100024

出　　处：《混凝土与水泥制品》2013年第9期10-12,共3页China Concrete and Cement Products

基　　金：国家科技支撑计划项目(2013BAJ10B03)

摘　　要：针对石碴在压制成型水泥基材料中的应用进行研究，探索了不同掺量的石碴（等量取代河砂）对水泥基材料抗折强度、吸水率和抗冻融等性能的影响规律。研究结果表明，随石碴掺量的增加，水泥基材料抗折强度先增大后减小，吸水率则呈减小趋势，抗冻融性能变差；当石碴掺量为0-40％时，水泥基材料满足GB／T50082-2009中D25抗冻等级指标要求。并对其机理进行了分析。According to the search of crushed sand application in cement-based materials, the flexural strength, water absorption and durability of cement-based materials with crushed sand （CBM-CS） produced by pressed forming are studied in this paper. The sand is replaced with crushed sand in this test. The flexural strength of CBM-CS firstly increase and then declines, and the water absorption decreases all the time with the sand weight replaced by crushed sand increased from 0% to 100%, and the freezing-thaw cycle resistance deteriorates, but meets norm specification, and the freezing-thaw cycle resistance of cement-base materials （dosage of crushed sand from 0% to 40%） meet D25 frost resisting class indica-tion in GB/T 50082--2009 （（Standard for test methods of long-term performance and durability of ordinary concrete〉）. And its mechanism is analyzed.

关 键 词：水泥基材料 石碴 吸水率 抗折强度 抗冻融性 

分 类 号：TQ172.78[化学工程—水泥工业]