纳米改性复合矿物外加剂对水泥性能和微观结构的影响  

Effect of Composite Nano-Addition on Mechanics Strength and Microstructure of Cement Paste

作　　者：孟涛[1] 钱匡亮[1] 钱晓倩[1] 詹树林[1] 

机构地区：[1]浙江大学,浙江杭州310027

出　　处：《稀有金属材料与工程》2008年第A02期631-633,共3页Rare Metal Materials and Engineering

基　　金：浙江省重大科技攻关项目"纳米改性混凝土复合矿物掺合料的制备与应用技术研究"资助(2005C11040)

摘　　要：研究了在高效减水剂存在时,内掺不同掺量的纳米碳酸钙和矿物外加剂时水泥水化性能和微观结构的变化情况。结果表明:在高效减水剂存在时,掺入少量的纳米碳酸钙,对水泥早期和后期强度影响不大,但是当纳米碳酸钙的掺量达到8%时,水泥的强度明显减小。采用不同掺量的纳米碳酸钙和矿粉等矿物外加剂复合,发挥其叠加效应。结果表明:掺入2%的纳米碳酸钙和8%的矿粉显示出良好的应用效果,不仅其力学性能得以显著提高,而且样品的收缩值降低约40%,抗氯离子渗透性能也明显改善。扫描电子显微分析也表明当掺入纳米改性复合矿物外加剂后,早期水泥水化矿物数量明显增多。The effect of composite nano-addition and water reducer on mechanics strength and microstructure of cement paste was experimentally studied and compared with that of normal cement paste. The results showed that the mechanics properties at early age were increased when adding 5% nano-CaCO3 to cement paste. Compressive strength and anti-penetration performance of cement paste were increased and the shrinkage of concrete was decreased with the composite nano-addition composing of 2% nano-CaCO3 and 8% slag powder. The results of SEM showed the hydrated products of cement were more and the microstructure was more compact than that of normal cement paste

关 键 词：矿物外加剂 抗压强度 微观结构 

分 类 号：TQ172.1[化学工程—水泥工业]