复合纳米材料和复合掺合料对混凝土性能影响的研究  

Research on the influence of composite nano-materials and admixtures on concrete

作　　者：杨瑞海[1] 陆文雄[1] 

机构地区：[1]上海大学化学系,上海200444

出　　处：《水泥工程》2008年第1期16-19,23,共5页Cement Engineering

摘　　要：研究了加入不同比例复合纳米材料和掺30%～40%四掺复合掺合料的胶砂和C40级混凝土的性能,对复配的C40级混凝土试块进行了氯离子和硫酸盐侵蚀试验、对复配净浆试块进行了扫描电镜(SEM)和差示扫描量热(DSC)测试,并讨论了复合纳米材料在混凝土中的不同加入方式。结果表明:相对于基准C40级混凝土,掺入复合掺合料和复合纳米材料配制的C40级混凝土的流动性和抗硫酸盐、氯离子侵蚀的能力均有所增强,其抗压强度提高约20%;复合纳米材料掺入减水剂用于混凝土的效果优于掺入复合掺合料用于混凝土,复合纳米材料掺入减水剂中可以很好地解决纳米材料易于团聚的问题,且其适宜掺入量为减水剂质量的0.5%～1.0%。The performance of cement mortar and C40 grade concrete, into which different proportion composite nano-materials and 30%-40% composite admixtures were mixed , were studied. The sulphate and chloride ions corrosion tests were used for C40 grade concrete ,the SEM and DSC tests were used for paste hydration products,and that how add composite nano-materials into cement was discussed .The results show that the composite nano-materials and composite admixtures can increase the fluidity, sulphate and chlo- ride ions resistance and compressive strength of C40 grade concrete ,the weight of mixed composite nano-materials which were added into water reducing agents is 0.5%-1.0% of water reducing agents＂ weight .

关 键 词：复合纳米材料 复合掺合料 净浆 胶砂 混凝土 抗压强度 SEM DSC 

分 类 号：TQ172[化学工程—水泥工业]