不同性质颗粒对超高强水泥基材料的增强效应研究  

Effects of Various Particles on Mechanical Properties of Very High Strength Cement-based Composites

作　　者：石明霞[1] 龙广成[1] 谢友均[1] 

机构地区：[1]中南大学土木建筑学院,长沙410075

出　　处：《材料导报（纳米与新材料专辑）》2009年第1期408-411,共4页

基　　金：国家自然科学基金（50708114,50178014）

摘　　要：试验调查了不同性质颗粒（粉煤灰、硅粉颗粒、橡胶颗粒、铁粉颗粒）对超高强水泥基材料的增强效应，结合微观结构分析探讨了相应的增强机理，提出了超高强水泥基颗粒增强材料微细观结构的物理模型。结果表明，不同性质的颗粒对水泥基材料的增强效应显著不同，采用活性矿物质颗粒和铁粉颗粒是提高超高强水泥基材料强度的有效途径，采用抗拉性能和变形性好的橡胶颗粒有利于提高超高强水泥基材料的韧性。Experiments are carried out to investigate the mechanical properties of very high strength cementitious composites（VHSC） reinforced by various powders such as reactive or inert mineral particles,iron powders and rubber particles. And also its corresponding mechanism is analyzed by coupling with microstructure test. A physical model for VHSC is presented. Results indicate that the strengthening effects of different particles with various mechanical properties are ob- viously different from each other. It is very effective to improve strength of VHSC by combination of reactive ultra-fine mineral particles and iron powders. The toughness of VHSC can be enhanced by addition of rubber particles.

关 键 词：超高强水泥基材料 铁粉 橡胶颗粒 矿物颗粒 增强效应 

分 类 号：TU528[建筑科学—建筑技术科学]