Effects of Activator on Micro-Structural Development of Blended Cement with High Content of Steel Slag
For a possible application of locally available steel slag in large quantity, a steel slag blended cement (SSBC) was successfully prepared by high amount of steel slag, and incorporation with granulated blast furnace slag (GBFS) and fly ash. To avoid performance loss when high amount of steel slag added to blended cement, especially early properties, a composite activator was added. In the present study, effects of activator on mechanical properties and microstructural development of the hardened paste were investigated by XRD, SEM, EDS and MIP, and compared it with corresponding clinker-steel slag system. The results show that the early strength of SSBC increased significantly and can be comparable with Portland cement after the addition of composite activator. Large amount of hydration products generated in early hydration period were observed in the pastes with composite activator, which intertwined with each other, filled the pores, and formed a dense microstructure, all of which leading to a remarkably increase of mechanical properties of SSBC.
steel slag activator blended cement microstructural development
T. S. Zhang Q. J. Yu J. X. Wei P. P. Zhang
School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640 School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640 School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640
国际会议
济南
英文
368-373
2010-05-09（万方平台首次上网日期，不代表论文的发表时间）