纳米粒子的制备及其在水泥基材料中的性能研究  

Preparation of nanoparticles and their properties in cement-based materials

作　　者：杨勇[1] 冉千平[1] 张建纲[1] 舒鑫[1] 孙贤敏 江姜[1] 

机构地区：[1]高性能土木工程材料国家重点实验室,江苏省建筑科学研究院有限公司,江苏苏博特新材料股份有限公司

出　　处：《新型建筑材料》2015年第7期3-6,13,共5页New Building Materials

基　　金：国家自然科学基金项目(51408273);江苏省自然科学基金项目(BK20131013)

摘　　要：通过化学沉淀法,采用2种分散剂分别制备了平均粒径为285 nm和146 nm的有机/无机杂化纳米C-S-H凝胶粒子,分散剂的加入大幅度提高了纳米粒子在溶液中的分散稳定性。考察了纳米粒子在水泥基材料中的性能,结果表明:纳米粒子能缩短水泥水化诱导期,加速水泥早期水化,提高水泥胶砂早龄期的抗压和抗折强度,且随着纳米粒子掺量的增加,早期增强作用效果越显著,对后期强度基本无影响。The nanoparticles with average particle size of 285 nm and 146 nm were prepared by chemical precipitation method using two different dispersants. The addition of the dispersant greatly improved the dispersion and stability of nanoparticles in so- lution. The properties of nanopartieles in the cement-based materials were studied. The results show that the nanopartieles can shorten the induction period of cement hydration,accelerate the early hydration of cement, and increase the early age compressive strength and flexural strength of cement mortar. With increasing the dosage of nanoparticles,the early age strength enhancement effect more obvious,and also have no negative effect on the long-term strength of cement mortar.

关 键 词：纳米粒子 水泥基材料 分散剂 水化 增强 

分 类 号：TU528.04[建筑科学—建筑技术科学]