湖南大学学报（自然科学版）2016，Vol.43Issue(6)：22-28,7.
纳米 CaCO3对水泥基材料性能与结构的影响及机理
Influence and Mechanism of Nano-CaCO3 on Properties and Structures of Cement-based Materials
摘要
Abstract
Nano‐CaCO3 was adopted into cement‐based materials in the ultrasonic dispersion method . The influence of nano‐CaCO3 with different contents on the properties and structures of cement‐based ma‐terials was studied ,and its mechanism was investigated by X‐ray diffraction and scanning electron micro‐scope .The results show that the fluidity is decreased ,the apparent density of cement paste is increased , and the flexural strength and compressive strength are improved due to the addition of nano‐CaCO3 .The mechanical properties of cement‐based materials containing nano‐CaCO3 of 1 .5% (in mass) are significant‐ly improved .However ,excessive dosage of nano‐CaCO3 goes against the improvement of strength .The hydration can be accelerated ,the hydration products such as Ca (OH)2 increase with the addition of nano‐CaCO3 at the early age ;the interface transition zone between aggregate and cement paste and the micro‐structure of hardened cement paste are greatly improved so that the w hole structure can get more dense and homogeneous .The above results indicate that the incorporation of nano‐CaCO3 is good for the physical properties and structures of cement‐based materials .关键词
纳米CaCO3/水泥基材料/强度/微观结构Key words
nano-CaCO3/cement-based materials/strength/microstructure分类
建筑与水利引用本文复制引用
王冲,刘俊超,张超,张聪,李宗阳,尹道道..纳米 CaCO3对水泥基材料性能与结构的影响及机理[J].湖南大学学报（自然科学版）,2016,43(6):22-28,7.基金项目
国家自然科学基金资助项目（51572038），National Natural Science Foundation of China（51572038）；重庆市科委自然科学基金资助项目 （）
