红砒砂岩细集料制备水泥砂浆及其性能研究  

Study of properties of cement mortars prepared of red pisha sandstone fine aggregate

作　　者：张美香[1] 罗忠涛[1] 殷会玲[1] 郑亚然[1] 卢冰洁[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》2015年第8期112-114,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水泥砂浆性能试验,研究不同砒砂岩替代率对水泥砂浆需水量、力学性能及体积稳定性的影响,并在此基础上进行减水剂适应性试验以提高砒砂岩替代率和保证性能。结果表明:砒砂岩安全替代率为10%,当超过50%以上时水泥砂浆水灰比增加明显,导致试件强度快速降低、干缩率增大而存在耐久性隐患。不同类型减水剂在此体系中试件的工作性及力学性能表现依次为脂肪族减水剂>聚羧酸减水剂>萘系减水剂。By replacing part of pisha sandstone of river sand,the effect of different pisha sandstone substitution rate of cement mortar water requirement, mechanical properties and volume stability were studied, and on this basis, water reducing agent was used to improve the Pisha Sandstone substitution rate and performance.The results showed that：security Pisha Sandstone substitution rate is 10%, when more than 50% above, the water cement ratio of cement mortar increased significantly, resulting in the rapid decrease of specimen strength, dry shrinkage.Mechanical performance of different types of water reducing agent in this system is aaliphatic superplasticizer sulphamate 〉 polycarboxylate based plasticizer 〉 naphthalene superplasticizer.

关 键 词：砒砂岩 细集料 水泥砂浆 性能 

分 类 号：TU528.041[建筑科学—建筑技术科学]