砒砂岩替代细集料制备混凝土及其抗冲蚀性能研究  

Study of erosion- wear of concrete prepared of Pisha sandstone fine aggregate

作　　者：张美香[1] 罗忠涛[1] 殷会玲[1] 卢冰洁[1] 郑亚然[1] 杨久俊[1,2] 

机构地区：[1]郑州大学材料科学与工程学院,河南郑州450052 [2]天津城建大学材料科学与工程学院,天津300384

出　　处：《混凝土》2016年第6期158-160,共3页Concrete

基　　金：国家科技支撑计划项目(2013BAC05B03-03)

摘　　要：采用砒砂岩替代部分河砂进行不同强度等级混凝土配制并研究其抗冲蚀性能。结果表明:红砒砂岩替代率在20%时所配制不同强度等级混凝土均能满足相应力学要求,且其拌合物工作性能够满足实际工程应用要求。C20-P、C25-P、C30-P混凝土的28 d线性收缩率均低于600×10-6,而C10-P混凝土28 d线性收缩率达到660×10-6。C10-P、C20-P、C25-P、C30-P的平均磨损率分别为10.12%、9.78%、9.76%、8.56%。主要在于混合砂的颗粒级配较差,并且含泥量较大,严重影响水泥浆体对骨料的黏结性和包裹性,导致其界面结合区弱化。By replacing part of Pisha sandstone of river sand,the erosion-wear of different strength grade concrete was studied.The re- suits show that the preparation of different strength grade of concrete can meet the strength requirements when red Pisha sandstone substi- tution rate is in 20%, and its mixture work-ability can meet the practical requirements of engineering application.28 d linear shrinkage rate of C20-P, C25-P, C30-P concrete are lower than 600×10^（-6）, and 28 d linear shrinkage rate of C 10-P concrete reaches to 660×10^（-6）.Average erosion-wear rate of C 10-P, C20-P, C25-P, C30-P are 10.12%, 9.78%, 9.76%, 8.56% .The main reason is that the particles graded poor mixed sand, and large mud content, serious impact on the cement paste aggregate bond and inclusions, all that lead to the interface bond weakened zone.

关 键 词：砒砂岩 细集料 水泥砂浆 抗冲蚀 

分 类 号：TU528.041[建筑科学—建筑技术科学]